TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Selection of gas turbine exit unit geometry with minimum pressure losses



Full text article ( in russian)

Year

 
2022

Issue

 
402

Volume

 
4

Pages

 
101-108

Caption

 
Selection of gas turbine exit unit geometry with minimum pressure losses

Authors

 
Ponomarev N.N.

Keywords

 
gas turbine, exit unit, axial-radial diffusor, pocket-type volute, minimum coefficient of total pressure losses

DOI

 
10.24937/2542-2324-2022-4-402-101-108

Summary

 
Object and purpose of research. This paper discusses gas turbine exit unit consisting of axial-radial diffusor and pockettype volute. The purpose of the study was to select the exit unit geometry that would offer minimum losses of total pressure.
Subject matter and methods. Experimental results obtained for the models of gas turbine exit units. Calculation of total pressure losses in SolidWorks package with Flow simulation extension. Correction coefficients were obtained through regression analysis. The exit unit geometry offering minimum losses of total pressure was obtained using the theory of experiment planning.
Main results. The study yielded correction coefficients to the calculation results obtained in SolidWorks package with Flow simulation extension. Exit unit geometry offering minimum losses of total pressure has been successfully found. The effect of strut location in the radial part of diffusor in terms of pressure losses has been quantified.
Conclusion. This study enables early identification of exit unit geometry with minimum total pressure losses, so it is valuable for practical gas turbine design.

Rubrics

 
Ship powering and electric systems

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