请教两相传热系数计算方法chen和HEX5的区别？ 在lty贴中已经找到答案。 希望有实际经验者介绍下这两中方法在有相变和无相变过程中，那种方法更贴和实际情况？如何选择？ 个人先说点看法，个人觉得在有相变的传热计算中选择hex5，最终压降比较贴近实际，跟htfs+计算的结果也相对吻合。 the two-phase heat transfer coefficient may be determined by one of two methods; modified chen vaporization method (newly added), or hex5 method (existing method). these two methods differ in the calculation of boiling and condensing film coefficients. the modified chen vaporization method is the default method used by pro/ii and it includes predictions for sub-cooled and film boiling. condensation methods account for flow regimes and gravity versus shear effects. hex5 method is supported for the backward compatibility. the two phase heat transfer coefficient method is effective only when change occurs on either shell side or tube side or both sides. for the phase change case, the modified chen vaporization and hex5 methods will result in different heat transfer coefficients. for the no phase change case, both modified chen vaporization and hex5 methods will give the same heat transfer coefficients. [ ]查看更多
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