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Heat transfer in valveless Helmholtz pulse combustor straight and elbow tailpipes

机译:无阀亥姆霍兹脉冲燃烧器的直管和弯头排气管中的热传递

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摘要

A heat transfer correlation is proposed for the pulsating flow in the tailpipe of a valveless Helmholtz pulse combustor. The correlation is developed based on the experimental data of the heat transfer in the straight tailpipe. The constants in the correlation are determined by least-squares fitting of experimental data. The regression model is assessed, and its significance is tested. The correlations of the 45°, 90°, and 135° elbow tailpipes are revised by multiplying factors to that of the straight tailpipe. The maximum error of the correlations is no more than 20%.
机译:对于无阀亥姆霍兹脉冲燃烧器的尾管中的脉动流,提出了传热相关性。相关性是基于直排气管中传热的实验数据得出的。相关性中的常数由实验数据的最小二乘拟合确定。评估了回归模型,并测试了其重要性。 45°,90°和135°弯头排气管的相关性通过乘以与直排气管相关的因子进行修正。相关的最大误差不超过20%。

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