Next Article in Journal
Aerodynamic Analysis of a Two-Bladed Vertical-Axis Wind Turbine Using a Coupled Unsteady RANS and Actuator Line Model
Previous Article in Journal
Dual Fuel Reaction Mechanism 2.0 including NOx Formation and Laminar Flame Speed Calculations Using Methane/Propane/n-Heptane Fuel Blends
Open AccessArticle

Evaluation and Improvement of the Sound Quality of a Diesel Engine Based on Tests and Simulations

1
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2
Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 777; https://doi.org/10.3390/en13040777
Received: 7 November 2019 / Revised: 17 January 2020 / Accepted: 6 February 2020 / Published: 11 February 2020
(This article belongs to the Section Energy and Environment)
Traditional acoustic evaluation of a diesel engine generally uses the A-weighted sound pressure level (AWSPL) and radiated sound power to assess the noise of an engine prototype present in an experiment. However, this cannot accurately and comprehensively reflect the auditory senses of human subjects during the simulation stage. To overcome such shortage, the Moore–Glasberg loudness and sharpness approach is applied to evaluate and improve the sound quality (SQ) of a 16 V-type marine diesel engine, and synthesizing noise audio files. Through finite element (FE) simulations, the modes of the engine’s block and the average vibrational velocity of the entire engine surface were calculated and compared with the test results. By further applying an automatically matched layer (AML) approach, the engine-radiated sound pressure level (SPL) and sound power contributions of all engine parts were obtained. By analyzing the Moore–Glasberg loudness and sharpness characteristics of three critical sound field points, an improvement strategy of the oil sump was then proposed. After improvement, both the loudness and sharpness decreased significantly. To verify the objective SQ evaluation results, ten noise audio clips of the diesel engine were then synthesized and tested. The subjective evaluation results were in accordance with the simulated analysis. Therefore, the proposed approach to analyze and improve the SQ of a diesel engine is reliable and effective.
Keywords: diesel engine; sound evaluation; Moore–Glasberg loudness; sharpness; sound improvement diesel engine; sound evaluation; Moore–Glasberg loudness; sharpness; sound improvement
MDPI and ACS Style

Yang, Z.; Feng, H.; Ma, B.; Khalifa, A.A.A. Evaluation and Improvement of the Sound Quality of a Diesel Engine Based on Tests and Simulations. Energies 2020, 13, 777.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop