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对充分发展的过热蒸汽湍流射流冲击平板的流动和换热进行了数值研究,分析了射流温度和射流雷诺数对蒸汽射流冲击换热的影响,并与空气射流冲击换热进行了比较。通过AKN k-ε、V2F和SST k-ω三种湍流模型计算结果的对比可知,SSTk-ω模型模拟冲击射流流动和换热的效果最好。研究表明:在相同条件下蒸汽的冲击换热能力强于空气;射流温度的变化对空气的冲击换热基本没有影响,但是对蒸汽有较大影响;射流雷诺数越大,则蒸汽冲击射流的换热越强。
The numerical simulation of flow and heat transfer of a fully developed turbulent jet impingement plate was carried out. The effects of jet temperature and jet Reynolds number on the impingement heat transfer of steam jet were analyzed and compared with those of air jet impingement heat transfer. Comparing the calculation results of three turbulence models AKN k-ε, V2F and SST k-ω, it can be seen that the SSTk-ω model is the best one to simulate the jet flow and heat transfer. The results show that the impact heat transfer of steam is better than that of air under the same conditions. The change of jet temperature has no effect on the impact heat transfer of air, but has a great effect on the steam. The larger the Reynolds number of jet, Heat the stronger.