双排叉排孔气膜冷却特性研究 (一) 传热系数
AN INVESTIGATION ON FILM-COOLING FROM TWO-STAGGERED ROWS OF HOLES ——(1)HEAT TRANSFER COEFFICLENTS
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摘要: 作者在Ludwieg风洞中研究了双排叉排孔的气膜冷却特性, 首次在瞬态风洞中实现了沿主流方向和横向两个方向的传热测量, 并给出了近孔区壁温和传热系数的变化细节。本文着重介绍传热系数的测量结果。Abstract: The film cooling performance downstream of injection from two staggered rows of holes were investigated in a Ludwieg tube wind tunnel.For the first time,heat transfer measurements were conducted in both streamwise and spanwise directions in a short duration flow facility.The details of wall temperature and heat transfer coefficient in region close to injection holes have been were obtained.
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