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Numerical simulation of flow and heat transfer characteristics in rotating double process of blade root passage (PDF)

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

Issue:
2023年02期
Page:
42-50
Research Field:
目次
Publishing date:

Info

Title:
Numerical simulation of flow and heat transfer characteristics in rotating double process of blade root passage
Author(s):
SHANG Mengyu1;  FAN Qing2;  ZHANG Ke1;  LEI Jiang1
(1.State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace,Xi'an Jiaotong University, Xi'an 710049, China; 2.Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
rotation;  blade root passage;  flow and heat transfer;  rotation number;  buoyancy parameter;  angled rib;  numerical simulation
PACS:
V231.1
DOI:
-
Abstract:
The imbalance of dynamic and thermal load inside the blade caused by rotation affects the safety and stability of turbomachinery seriously.In order to study the influence of rotation number and buoyancy coefficient on the flow and heat transfer characteristics in the internal passage of rotor blade,smooth and ribbed passages were simulated with CFD simulation under the conditions of rotation number 0,0.15,0.2,0.25,0.3 and buoyancy parameter 0,0.3,0.4,0.5,0.6, respectively.The results show that with the increase of rotation number,Coriolis force is enhanced and the heat transfer in the edge of same direction of Coriolis force is strengthened.With the increase of buoyancy coefficient, the effect of rotary buoyancy force will be enhanced,which will lead to the double peak flow state appeared at the leading and trailing edges of the inflow passage, and the flow separation or the even backflow occurred at the leading edges of the outflow passage.By the comprehensive comparison between the smooth passage and the ribbed passage, the heat transfer intensity in the ribbed passage is higher, and the effect of rotation is less than that of the smooth passage.

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