| Citation: | Li Ming, Wang Yong, Shen Jiayuan, et al. Numerical simulation and experimental study on flow and heat transfer characteristics in tube with jet chamber[J]. Journal of Aerospace Power, 2027, 42（1）：20250422 doi: 10.13224/j.cnki.jasp.20250422
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The single-phase convection heat transfer in traditional tube suffers from thick thermal boundary layer and insufficient fluid mixing. This study proposes a novel jet chamber insert to generate strong jetting flow. The effects of jet chamber on fluid flow and heat transfer characteristics of tube are experimentally and numerically investigated for Reynolds number varying from 200 to 1100. The results indicate that the jet chamber is capable of generating jet flows that impacts the inner wall vertically and disrupts the fluid and thermal boundary layers. Spatial fluid mixing is achieved, significantly enhancing convective heat transfer in terms of Nusselt number (Nu). The experimental results indicate that the normalized Nu is enhanced about 1-fold compared to that of coiled wire and vortex rods inserts. Also, the performance evaluation criteria (
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