热气防冰系统内表面弦向传热性能衰减规律

发布时间：2018-05-04 22:43

本文选题：热气防冰系统 + 笛形管　；参考：《北京航空航天大学学报》2016年01期

【摘要】：利用反向热流法实验研究了弦向3排射流喷口,且中央喷口正对前缘驻点结构下射流冲击热气防冰系统前缘内表面的局部传热特性。重点研究了喷孔射流出口雷诺数Rej、笛形管相对于前缘的距离与孔径比Zn/d、射流冲击驻点区弦向弧长与孔径比r/d对冲击前缘靶面的局部传热性能分布的影响。实验中Rej范围为2.5×104~1×105,Zn/d范围为1.736~27.5,r/d范围为13.21~61.5。结果表明,局部传热性能分布曲线为从驻点开始向两侧衰减的钟形曲线,包括稳定段、下降段和结束段3部分,其中稳定段只受参数r/d的影响,而参数Rej、Zn/d和r/d均能够明显影响下降段的下降速率,参数r/d则几乎不会改变下降段的总下降幅度。总结了此类喷口结构下射流冲击前缘换热性能衰减分布曲线的通用实验关联式,以指导防冰系统的设计和热性能的评估。
[Abstract]:In this paper, the local heat transfer characteristics of the inner surface of the front edge of the hot air ice prevention system with jet impingement on the front edge of the central nozzle are studied by using the reverse heat flux method under the structure of the chord three row jet nozzle and the front edge of the central nozzle. The effects of Reynolds number at jet outlet, the ratio of diameter and distance of flute tube to front edge, the chord arc length and aperture ratio r / d of jet impingement on the local heat transfer performance are studied. The range of Rej is 2.5 脳 10 ~ (4) ~ (-1) 脳 10 ~ (5) O ~ (-1) Zn / d = 1.736 ~ (27. 5) r / (r ~ (-1)) = 13.21 ~ 61.5. The results show that the distribution curve of local heat transfer performance is a bell-shaped curve that attenuates to both sides from the stationary point, including three parts: the stable section, the descending section and the end section, where the stable section is affected only by the parameter r / r / d. The parameters of Rejn Zn / d and r / d can significantly affect the decreasing rate of the descending segment, and the parameter r / d can hardly change the total decline rate of the descending segment. The general experimental correlation of the attenuation curve of the heat transfer performance of the jet impingement leading edge under this nozzle structure is summarized in order to guide the design of the anti-ice system and the evaluation of the thermal performance.
【作者单位】：北京航空航天大学航空科学与工程学院;中国科学院工程热物理研究所;
【基金】：国家自然科学基金(51206008)~~
【分类号】：V244.15

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