Next Article in Journal
Effect of Distortion on Turbofan Tonal Noise at Cutback with Hybrid Methods
Next Article in Special Issue
Parameterised Model of 2D Combustor Exit Flow Conditions for High-Pressure Turbine Simulations
Previous Article in Journal
CAD Integrated Multipoint Adjoint-Based Optimization of a Turbocharger Radial Turbine
Previous Article in Special Issue
Influence of Pressure Fluctuations on the Mean Value of Different Pneumatic Probes
Article Menu

Export Article

Open AccessArticle
Int. J. Turbomach. Propuls. Power 2017, 2(3), 15; https://doi.org/10.3390/ijtpp2030015

The Effect of Hot Streaks on a High Pressure Turbine Vane Cascade with Showerhead Film Cooling

Department of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine, Italy
This paper is an extended version of our paper in Proceedings of the European Turbomachinery Conference ETC12, 2017, Paper No. 44.
*
Author to whom correspondence should be addressed.
Academic Editor: Tony Arts
Received: 10 May 2017 / Revised: 5 September 2017 / Accepted: 6 September 2017 / Published: 13 September 2017
Full-Text   |   PDF [9868 KB, uploaded 20 September 2017]   |  

Abstract

Hot streak migration in a linear vane cascade with showerhead film cooling was experimentally and numerically investigated at isentropic exit Mach number of Ma2is = 0.40, with an inlet turbulence intensity level of Tu1 = 9%. Two tangential positions of the hot streak center were taken into account: 0% of pitch (hot streak is aligned with the vane leading edge) and 45% of pitch. After demonstrating that computations correctly predict hot streak attenuation through the vane passage with no showerhead blowing, the numerical method was used to investigate hot streak interaction with showerhead film cooling, at blowing ratio of BR = 3.0, corresponding to a coolant-to-mainstream mass flow ratio of MFR = 1.15%. The effects of mixing and coolant interaction on the hot streak reduction were interpreted under the light of the superposition principle, whose accuracy was within 12% on the leading edge region, in the central section of the vane span. View Full-Text
Keywords: hot streak; first stage vane; showerhead film cooling hot streak; first stage vane; showerhead film cooling
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Barigozzi, G.; Mosconi, S.; Perdichizzi, A.; Ravelli, S. The Effect of Hot Streaks on a High Pressure Turbine Vane Cascade with Showerhead Film Cooling. Int. J. Turbomach. Propuls. Power 2017, 2, 15.

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 Metrics

Article Access Statistics

1

Comments

[Return to top]
Int. J. Turbomach. Propuls. Power EISSN 2504-186X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top