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361 Results Found

  • Article
  • Open Access
827 Views
17 Pages

Optimization Method of Heat-Sealing Process for Pillow Packaging Machine

  • Hongbing Zhang,
  • Dongsheng Hu,
  • Yuanbin He,
  • Langbin Jin,
  • Ying Zhang,
  • Jiajia Tu and
  • Yang Li

7 November 2025

Aiming at the problems of low production efficiency and high manual dependence in the heat-sealing process of the pillow packaging machine, the existing optimization methods of process parameters were improved, and an intelligent decision-making mode...

  • Article
  • Open Access
1,275 Views
24 Pages

Heat-Sealing Process for Chañar Brea Gum Films

  • María Fernanda Torres,
  • Federico Becerra,
  • Mauricio Filippa,
  • Gisela Melo and
  • Martin Masuelli

9 July 2025

This work presents a comprehensive evaluation of the heat-sealability of films developed from chañar brea gum (CBG), a biopolymer with potential for packaging applications. Heat sealability is a critical property in the packaging industry, as it dire...

  • Article
  • Open Access
4 Citations
2,367 Views
13 Pages

19 August 2021

Currently, renewable energy is increasingly important in the energy sector. One of the so-called renewable energy sources is geothermal energy. The most popular solution implemented by both small and large customers is the consumption of low-temperat...

  • Article
  • Open Access
26 Citations
3,634 Views
12 Pages

20 March 2020

Two-component fibrous materials based on poly(3-hydroxybutyrate) (PHB, Tm = 160 °C) and poly(ε-caprolactone) (PCL, Tm = 60 °C) were successfully fabricated by dual-jet electrospinning of their separate spinning solutions. The desired...

  • Article
  • Open Access
4 Citations
2,379 Views
19 Pages

2 September 2022

The freeze-sealing pipe roof (FSPR) method was applied as an innovative construction technology to the Gongbei Tunnel of the Hong Kong–Zhuhai–Macau Bridge. A freezing scheme involving master freezing tubes, enhancing freezing tubes, and limiting free...

  • Article
  • Open Access
7 Citations
2,495 Views
22 Pages

28 October 2023

A brush seal is a type of contact sealing technology that generates a great amount of heat during operations. The heat can affect the seal’s performance and lifespan. To study the brush seals’ temperature distribution, a new model conside...

  • Article
  • Open Access
5 Citations
2,280 Views
18 Pages

2 September 2022

The freeze-sealing pipe roof (FSPR) method has been applied to the Gongbei tunnel of the Hongkong–Zhuhai–Macau Bridge, which is the first application of this method in the world. The purpose of the ground-freezing method is soil waterproo...

  • Article
  • Open Access
3 Citations
2,314 Views
27 Pages

Multiphase Conjugate Heat Transfer Analyses on the Assembly Situation of Rotary Shaft Seals

  • Jacqueline Hannss,
  • Jeremias Grün,
  • Christoph Olbrich,
  • Simon Feldmeth and
  • Frank Bauer

6 October 2023

Rotary shaft seals prevent the exchange of fluid at shaft passages. Their function and service life depend decisively on the temperature in the contact area between the sealing edge and the shaft. Since the temperature depends on both the generation...

  • Article
  • Open Access
2 Citations
3,491 Views
13 Pages

15 November 2019

There has been a recent surge of interest in vacuum insulating glass (VIG) due to its excellent thermal insulation performance. Vacuum glazing is necessary for high-performance sealing solders and various applications in sealing technology. This pape...

  • Article
  • Open Access
14 Citations
6,988 Views
17 Pages

Effects of the Back Plate Inner Diameter on the Frictional Heat Input and General Performance of Brush Seals

  • Manuel Hildebrandt,
  • Heiko Schwarz,
  • Corina Schwitzke,
  • Hans-Jörg Bauer and
  • Jens Friedrichs

Reducing losses in the secondary air system of gas and steam turbines can significantly increase the efficiency of such machines. Meanwhile, brush seals are a widely used alternative to labyrinth seals. Their most valuable advantage over other sealin...

  • Article
  • Open Access
13 Citations
3,437 Views
15 Pages

25 April 2022

To investigate the influence of the variation of geometric parameters on the leakage and heat transfer characteristics of labyrinth seals at various rotational speeds, the labyrinth seal models with different geometric parameters were numerically sim...

  • Article
  • Open Access
6 Citations
2,287 Views
13 Pages

3 September 2021

This article presents a variable-order derivative (VOD) time fractional model for describing heat transfer in the rotor or stator in non-contacting mechanical face seals. Most theoretical studies so far have been based on the classical equation of he...

  • Article
  • Open Access
4 Citations
2,227 Views
21 Pages

6 September 2023

By setting textures on the side walls of a rotor, based on SST k-ω turbulence and the mixture model, the effects of depth-to-diameter ratio, shape, and rotational speed on interface temperature are analyzed. Local Nu number, flow field in textu...

  • Article
  • Open Access
2,004 Views
11 Pages

23 June 2023

As a crucial component for temporary blocking of layer segments in the segmental fracturing process, bridge plugs are difficult to unseal by conventional methods and may cause major downhole accidents if not handled properly. In this paper, a nanoflu...

  • Article
  • Open Access
8 Citations
2,771 Views
15 Pages

19 September 2022

In this study, to improve the accuracy of the brush seal heat transfer model, based on the finite volume method (FVM) coupled with the three-dimensional Reynold-averaged Naviers-Stokes equations (RANS) equations of the Local temperature non-equilibri...

  • Article
  • Open Access
37 Citations
11,008 Views
17 Pages

16 January 2018

In this study, polyamide-aluminum foil-polypropylene (PA-Al-PP) composite films with different orientation status of the PP layer were prepared, and their morphology, tensile, peeling and heat seal behavior were studied. The comparative study of tens...

  • Article
  • Open Access
4 Citations
1,405 Views
29 Pages

Study on Interstage Pressure Equalization of Differential Multi-Stage Finger Seal with Structural Design, Flow and Heat Transfer Characteristics

  • Juan Wang,
  • Wei Xu,
  • Meihong Liu,
  • Shixing Zhu,
  • Yuchi Kang,
  • Xiaolei Song,
  • Dianhai Gu and
  • Xuefeng Hu

24 October 2024

To effectively address the issue of premature failure caused by the unbalanced distribution of pressure drops between the stages of a traditional two-stage finger seal, this study proposes a method to improve the pressure drop balance by increasing t...

  • Article
  • Open Access
12 Citations
4,531 Views
34 Pages

Swirl Flow and Heat Transfer in a Rotor-Stator Cavity with Consideration of the Inlet Seal Thermal Deformation Effect

  • Yu Shi,
  • Shuiting Ding,
  • Peng Liu,
  • Tian Qiu,
  • Chuankai Liu,
  • Changbo Qiu and
  • Dahai Ye

31 January 2023

In the typical structure of a turboshaft aero-engine, the mass flow of the cooling air in the rotor-stator cavity is controlled by the inlet seal labyrinth. This study focused on the swirl flow and heat transfer characteristics in a rotor-stator cavi...

  • Feature Paper
  • Article
  • Open Access
16 Citations
2,972 Views
25 Pages

29 March 2021

This paper discusses the question of heat flux distribution between bristle package and rotor during a rubbing event. A three-dimensional Computational Fluid Dynamics (3D CFD) model of the brush seal test rig installed at the Institute of Thermal Tur...

  • Article
  • Open Access
18 Citations
7,897 Views
17 Pages

Characterizing Mechanical, Heat Seal, and Gas Barrier Performance of Biodegradable Films to Determine Food Packaging Applications

  • Bram Bamps,
  • Rafael Moreno Macedo Guimaraes,
  • Gwen Duijsters,
  • Dries Hermans,
  • Jan Vanminsel,
  • Evelynn Vervoort,
  • Mieke Buntinx and
  • Roos Peeters

24 June 2022

In an organic circular economy, biodegradable materials can be used as food packaging, and at end-of-life their carbon atoms can be recovered for soil enrichment after composting, so that new food or materials can be produced. Packaging functionality...

  • Article
  • Open Access
197 Views
15 Pages

6 January 2026

Commercialization of natural gas hydrates still faces challenges. Before large-scale production becomes feasible, efficient exploitation methods must be continuously explored. Based on field data from China’s first trial production, a novel fiv...

  • Article
  • Open Access
174 Views
16 Pages

Natural gas hydrates (NGHs) are a promising alternative energy source with huge global reserves, but they face significant challenges in commercial production and require more efficient exploitation methods. Based on field data from China’s fir...

  • Article
  • Open Access
2 Citations
1,054 Views
22 Pages

17 October 2024

Depressurization combined with heat (mainly hot water) injection is an important technique for exploiting natural gas hydrate (NGH). To overcome the problems of pore water intrusion and hot water energy loss in the technique, this paper employs a met...

  • Article
  • Open Access
7 Citations
2,480 Views
14 Pages

5 July 2021

The fluid flow in the runner of a hydraulic turbine has serious uncertainties. The sealing failure of the magnetorheological (MR) fluid sealing device of the main shaft of the hydroturbine, caused by a sudden change in speed, has always been a diffic...

  • Article
  • Open Access
972 Views
20 Pages

4 September 2025

In the process of heat contact sealing of thin, flexible polymer films, the choice of the film material, the layer structure, the sealing tools, and the process parameters influence the melt flow. A pronounced melt flow dynamic, which is to be expect...

  • Article
  • Open Access
5 Citations
2,365 Views
16 Pages

12 October 2020

The purpose of this study was to develop a mathematical model for non-contacting face seals to analyze how their performance is affected by thermoelastic phenomena. The model was used to solve thermal conductivity and thermoelasticity problems. The p...

  • Article
  • Open Access
2 Citations
4,286 Views
19 Pages

The literature already contains some experimental, analytical and numerical investigations on the rubbing and hysteresis behaviour of brush seals. What the investigations have in common is that they were carried out with new and uncontaminated seals,...

  • Article
  • Open Access
6 Citations
2,885 Views
19 Pages

8 December 2022

The increasing accumulation of non-degradable plastic food packaging is a global concern. In this study, we aimed to optimize the heat-sealing process of fish skin gelatin/L-arabinose (FG-Ara) composite films modified by the Maillard reaction. The ef...

  • Article
  • Open Access
1 Citations
2,696 Views
19 Pages

23 February 2022

To improve the performance of the intra-vane type pump and optimize the friction characteristics of the three friction pairs related to the vane cavity, theoretical analysis, numerical simulation, and experimental testing are used to study the mechan...

  • Article
  • Open Access
1,127 Views
27 Pages

Investigation of Improved Labyrinth Seal Stability Accounting for Radial Deformation

  • Guozhe Ren,
  • Hongyuan Tang,
  • Dan Sun,
  • Wenfeng Xu and
  • Yu Li

This study examines the labyrinth seal disc of an aero-engine, specifically analysing the radial deformation caused by centrifugal force and heat stress during operation. This distortion may lead to discrepancies in the performance attributes of the...

  • Article
  • Open Access
5 Citations
7,541 Views
15 Pages

Effect of Ingress on Flow and Heat Transfer Upstream and Downstream of a Rotating Turbine Disc

  • Hui Tang,
  • GeonHwan Cho,
  • Mario Patinios,
  • James A. Scobie,
  • Carl M. Sangan,
  • J. Michael Owen and
  • Gary D. Lock

Ingress is the penetration of a hot mainstream gas in a turbine annulus through the rim seal into the wheel-space between the rotating turbine disc (the rotor) and the adjacent stationary casing (the stator). Purge flow is used to prevent or reduce i...

  • Article
  • Open Access
8 Citations
1,863 Views
18 Pages

23 November 2024

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a biodegradable biopolymer from the PHAs family that has potential to replace conventional plastics and reduce plastic pollution. However, PHBV has thermo-sealability issues, making it challengin...

  • Article
  • Open Access
899 Views
17 Pages

26 November 2024

Sweet potato is essential for food security, but its transplanting efficiency is currently low. To improve this, we developed a belt-type transplanter that uses seedling belt technology for automated feeding, increasing efficiency by over 25%. The us...

  • Article
  • Open Access
16 Citations
9,581 Views
19 Pages

16 November 2016

Packaging protects food products from environmental influences, assuring quality and safety throughout shelf life if properly performed. Packaging quality depends on the quality of the packaging material and of the closure or seal. A common problem p...

  • Article
  • Open Access
15 Citations
3,641 Views
16 Pages

The solubility of a drug is higher when it is in an amorphous form than when it is in a crystalline form. To enhance the solubility of ibuprofen (IBU), a poorly water-soluble drug, we attempted to adsorb IBU onto spherical porous calcium silicate (Fl...

  • Article
  • Open Access
1 Citations
3,538 Views
23 Pages

Design of Waterborne Asymmetric Block Copolymers as Thermoresponsive Materials

  • Gordana Siljanovska Petreska,
  • Christof van Sluijs,
  • Clemens Auschra and
  • Maria Paulis

30 May 2020

AB diblock waterborne copolymers made of styrene (St) and 2-ethylhexyl acrylate (2EHA) were synthesized by means of two-step reversible addition fragmentation chain transfer (RAFT) (mini)emulsion polymerization. Monofunctional asymmetric RAFT agent w...

  • Article
  • Open Access
3,624 Views
23 Pages

Numerical Prediction of Internal Flows in He/LOx Seals for Liquid Rocket Engine Cryogenic Turbopumps

  • Lorenzo Maritano,
  • Francesco Maria Marin,
  • Cristina Bertani,
  • Dario Pastrone,
  • Maddalena Angelucci and
  • Giuseppe Caggiano

24 October 2022

Cryogenic turbopumps are used in high-performance, lightweight liquid rocket engines for space applications. The development of bearings and shaft seals for cryogenic turbopumps requires detailed characterization of the internal flow, taking into acc...

  • Article
  • Open Access
10 Citations
14,214 Views
23 Pages

30 August 2012

Pitch value is an important consideration in residential gable roof design and construction. However, how roof pitch, coupled with air flows in attic space, affects the energy performance of building attics has been barely investigated. In this paper...

  • Article
  • Open Access
16 Citations
4,261 Views
22 Pages

3 February 2021

Quality control of heat sealed bottles is very important to minimize waste and in some cases protect people’s health. The present paper describes a case study where an automated non invasive and non destructive quality control system was designed to...

  • Article
  • Open Access
12 Citations
5,713 Views
20 Pages

Heat-Seal Ability and Fold Cracking Resistance of Kaolin-Filled Styrene-Butadiene-Based Aqueous Dispersions for Paper-Based Packaging

  • Andrea Marinelli,
  • Mauro Profaizer,
  • Maria Vittoria Diamanti,
  • MariaPia Pedeferri and
  • Barbara Del Curto

Dispersion coatings are offered as alternative solutions to extrusion coating technology for paper-based packaging. In addition to providing barrier properties, waterborne dispersions may implement the processing and converting properties of coated s...

  • Article
  • Open Access
39 Citations
9,658 Views
17 Pages

Urban Imperviousness Effects on Summer Surface Temperatures Nearby Residential Buildings in Different Urban Zones of Parma

  • Marco Morabito,
  • Alfonso Crisci,
  • Teodoro Georgiadis,
  • Simone Orlandini,
  • Michele Munafò,
  • Luca Congedo,
  • Patrizia Rota and
  • Michele Zazzi

24 December 2017

Rapid and unplanned urban growth is responsible for the continuous conversion of green or generally natural spaces into artificial surfaces. The high degree of imperviousness modifies the urban microclimate and no studies have quantified its influenc...

  • Article
  • Open Access
2,503 Views
11 Pages

The Problem of Accounting for Heat Exchange between the Flow and the Flow Part Surfaces When Modeling a Viscous Flow in Low-Flow Stages of a Centrifugal Compressor

  • Sergey Kartashov,
  • Yuri Kozhukhov,
  • Vycheslav Ivanov,
  • Aleksei Danilishin,
  • Aleksey Yablokov,
  • Aleksey Aksenov,
  • Ivan Yanin and
  • Minh Hai Nguyen

21 December 2020

In this paper, we review the problem of accounting for heat exchange between the flow and the flow part surfaces when creating a calculation model for modeling the workflow process of low-flow stages of a centrifugal compressor using computational fl...

  • Proceeding Paper
  • Open Access
1,102 Views
5 Pages

6 November 2024

Gas blow-by flow through a turbocharger sealing system has a significant effect on lubricant consumption and the formation of particles. This paper presents an experimentally validated computational model to quantify the mass flow of gasses through a...

  • Article
  • Open Access
3 Citations
2,049 Views
23 Pages

A dry gas seal (DGS) is one of the key basic components of natural gas transmission pipeline compressors, and the sealing performance of a DGS dealing with complex multi-component pipeline natural gas is different from that dealing with conventional...

  • Article
  • Open Access
2,448 Views
26 Pages

14 December 2024

Regulatory demands for indoor air renewal in buildings entail high levels of energy consumption. This is the only way to provide minimum indoor air quality (IAQ) and avoid some common lesions and pathologies. In Passivhaus standard (PHS) houses, a he...

  • Article
  • Open Access
115 Views
15 Pages

16 January 2026

A method for quality inspection of food packaging based on hybrid imaging and machine-learning techniques is presented. The proposed inspection system integrates thermal and visible-light imaging, enabling detection and classification of faults such...

  • Feature Paper
  • Article
  • Open Access
686 Views
19 Pages

The current work highlights key challenges in the design of small-scale, high-rotational-speed centrifugal compressors for R-290 at domestic application scale on the basis of a single-stage demonstrator unit that is currently developed by ebm-papst....

  • Article
  • Open Access
4 Citations
3,383 Views
17 Pages

29 November 2023

The heat generated during the startup process of dry gas seals, such as the friction heat of the asperities, viscous shear heat, and the expansion heat of the gas film, easily leads to seal failure and endangers the stable operation of turbomachinery...

  • Article
  • Open Access
1 Citations
3,379 Views
22 Pages

Mechanical seals ensure the internal sealing of centrifugal pumps from the surrounding environment. They are one of the most critical components in a centrifugal pump. For this reason, the condition of mechanical seals should be monitored during oper...

  • Article
  • Open Access
13 Citations
2,907 Views
15 Pages

1 September 2023

This work focuses on different surface treatment processes of the 6061 aluminum alloy profile coatings in the construction industry, mainly including the sand powder film coating, the flat powder coating, the hard anodized film, and the ordinary heat...

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