管带式散热器空气侧传热和阻力特性实验研究

文章采用换热器风洞实验, 对 22 种不同结构参数的矩形波纹翅片管带式散热器进行传热和流动阻力性能实验, 选用 361 组工况点的实验数据, 经过多元线性回归, 获得适用于矩形波纹翅片散热器空气侧传热因子 j 和摩擦因子 f 的计算模型, 预测散热器的传热和阻力特性。研究结果表明, 雷诺数在 400～3840 范围内, 换热器空气侧散热量、压降的计算值与实验值之间最大相对误差分别为 9.14%、10.05%, 标准误差分别为 8.62%、3.75%, 计算值与实验值之间吻合性较好。

Wind tunnel test was conducted to study on the air-side heat transfer and flow resistance performance for 22 types of ribbon-tubular radiators with rectangular corrugated fin under different structure parameters. By using multiple linear regression, the mathematical models of air-side heat transfer factor j and friction factor f of the radiator were constructed based on 361 experimental data for predicting the heat transfer and resistance characteristics. The result shows that in the Reynolds number range of 400 to 3 840, the maximum relative errors between the calculated and experimental values of air-side heat dissipation and pressure drop of the radiator are 9.14% and 10.05%, respectively, and the standard errors are 8.62% and 3.75%, respectively. Model predictions are in good agreement with the experimental results.