Numerical calculation and experimental test of heat radiation-convection coupling heat transfer characteristics of turbine casing

被引：0

作者：

Chen H. ^{[1
]}

Li J. ^{[2
]}

Shi H. ^{[2
]}

Wang T. ^{[2
]}

Song F. ^{[2
]}

Wang T. ^{[2
]}

Liu X. ^{[2
]}

机构：

[1] Shenyang Engine Research Institute, Aero Engine Corporation of China, Shenyang

[2] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2022年 / 37卷 / 08期

关键词：

casing experiment; fluid-solid coupling; natural convection; radiation heat transfer; turbine casing;

D O I：

10.13224/j.cnki.jasp.20210529

中图分类号：

学科分类号：

摘要：

The heat radiation-convection coupling calculation of the entire ring casing was carried out, the comprehensive heat transfer coefficient fitting relationship was obtained, and the experimental test was verified. The study found that the existence of heat radiation in the enclosed cavity greatly strengthened the wall heat transfer. The ratio of radiant heat flow to the total heat transfer can reach more than 90%. In the three-layer receiver structure, when the emissivity changed from 0.3 to 0.8, the temperature gradient in the radial direction of the receiver decreased, the convective heat transfer in the mainstream area was strengthened, and the convective intensity in the semi-enclosed area decreased. When the emissivity was 0.8, the radiant heat flow on the fluid sidewall of the outer casing accounted for 33.3% of the total heat transfer. © 2022 BUAA Press. All rights reserved.

引用

页码：1597 / 1606

页数：9

共 25 条

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