Study of Heat Transfer Characteristics under Different Jet Angels in a Wedge Channel

Journal of Propulsion Technology ›› 2017, Vol. 38 ›› Issue (8): 1819-1825.

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Study of Heat Transfer Characteristics under Different Jet Angels in a Wedge Channel

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China and School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

楔形通道内带角度射流冲击换热特性研究

蒋新伟,许卫疆,朱惠人,郭欣

西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072

作者简介:蒋新伟，男，硕士生，研究领域为航空发动机高温部件传热与冷却。

Abstract

Abstract: In order to obtain the heat transfer characteristics for impingement of a strut in aero engine inlet，experiments were carried out with the use of transient thermochromic liquid crystal measurement technique in a wedge channel. The effects of jet Reynolds number，jet angle and position of outlet slot on Nusselt(Nu) number distribution were studied with the jet Reynolds number range from 6.3×103 to 15.9×103 and jet angle from 0° to 30°.The results show that the average heat transfer in the wedge channel was enhanced with the increasing Reynolds number and jet angle.The wall has a greater heat transfer when the slot near impingement inlet with the jet angle range from 0° to 15°.The Nu number of two sides of the wedge channel is asymmetric under the condition that jet angle is not vertical.When the jet angel is 30°，the nonuniform is the most obvious. The Nu number is the highest at leading edge when the jet angel is 15°.

Key words: Jets impingement；Heat transfer enhancement；Anti-icing；Inlet strut；Transient temperature measurement

摘要： 为了获得某型发动机支板内通道冲击射流的换热特性，采用热色液晶全表面瞬态测温技术对楔形通道内表面进行换热实验。研究了射流雷诺数、射流角度和出口缝的位置对努塞尔数的分布和大小的影响。射流雷诺数的变化范围是6.3×103～15.9×103，射流角度的变化为0～30°。研究表明:射流雷诺数的增加，射流角度的增大均会使得平均换热效果增强。在射流角度0～15°内，出口缝离射流入口越近，壁面换热越强。射流斜吹情况下，被冲击面的努塞尔数要高于未被冲击面。其中，射流角度30°时换热的不对称性最显著。在射流角度为15°时，支板前缘的换热效果最强。

关键词: 射流冲击；强化换热；防冰；进口支板；瞬态测温

JIANG Xin-wei,XU Wei-jiang,ZHU Hui-ren,GUO Xin. Study of Heat Transfer Characteristics under Different Jet Angels in a Wedge Channel[J]. Journal of Propulsion Technology, 2017, 38(8): 1819-1825.

蒋新伟,许卫疆,朱惠人,郭欣. 楔形通道内带角度射流冲击换热特性研究[J]. 推进技术, 2017, 38(8): 1819-1825.

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Study of Heat Transfer Characteristics under Different Jet Angels in a Wedge Channel

楔形通道内带角度射流冲击换热特性研究

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