|Table of Contents|

Numerical simulation and design optimization of subsonic partial admission turbine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年01期
Page:
25-30
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical simulation and design optimization of subsonic partial admission turbine
Author(s):
MAO Kai; WANG Xiaofeng; YUAN Weiwei; JIANG Jianyuan
(Xi'an Aerospace Propulsion Institute,Xi'an 710100, China)
Keywords:
subsonic speed;  partial admission;  turbine;  loss analysis;  intake and exhaust structure
PACS:
V430
DOI:
-
Abstract:
Based on the SST turbulence model, by solving RANS-Navier-stokes equations, a three-dimensional, viscous, steady analysis was performed for turbine full flow field with partial admission and subsonic characteristics.In order to obtain the specific amount of loss of each channel, four models were calculated, which contain different loss passages.Results show that the original turbine's blade passage loss, leakage loss and partial admission loss are at a low level.The performance of intake and exhaust structure is poor, with messy internal flow and a large amount of separation vortexes, which has a great impact on turbine efficiency and great space for improvement.Finally, through the optimization of turbine intake and exhaust structure, the variable cross-section volute structure with tangential intake and tangential exhaust was adopted.Three-dimensional calculations show that efficiency of turbine components after optimization is increased from 0.675 to 0.706(an increase of 4.59%)and turbine axial size is greatly reduced.

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Last Update: 2019-02-20