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本文针对高温氦气在光管及波节管中的传热特性及阻力特性进行了Reynolds Stress Model(RSM)数值模拟研究。比较模拟计算和经验公式的结果,两者基本吻合。比较了Nu和f在波节管和光管中的变化规律,同时,分析了波节管的局部Nu和局部壁面剪切应力τ_w沿壁面的变化规律。数值模拟结果表明相同工况下波节管的Nu大于光管,说明波节管具有较强的强化换热能力,同时,波节管的f也有一定增加,但波节管总体性能优于光管。在较大雷诺数下,波节管具有更佳综合性能。
In this paper, the Reynolds Stress Model (RSM) numerical simulation of the heat transfer and resistance characteristics of high temperature helium in a light pipe and a nodular tube was carried out. Comparing the results of simulation and empirical formula, the two basically agree. The variation regularities of Nu and f in the nodular tube and the light tube were compared. Meanwhile, the variation rule of the local Nu and the local wall shear stress τ_w along the wall was analyzed. The numerical simulation results show that the Nu of the nodular tube under the same conditions is larger than that of the light tube, indicating that the nodular tube has strong heat transfer enhancement ability and the f of the nodular tube also increases to a certain extent, but the overall performance of the nodular tube is better than that of the light tube. At larger Reynolds numbers, the knot tube has better overall performance.