本文对研制加工的适用于 100 kW 微型燃气轮机的 CW(Cross Wavy) 原表面回热器进行了试验研究,通过对两侧流体进、出口温度、压力等的测量,重点分析了燃气流量、入口温度及空气进口压力变化对换热阻力的影响,得出了在变工况下回热器的流动与换热性能规律,结果表明:所研制的 CW 原表面回热器空、燃气两侧换热均匀,提高了换热效率,两侧压降都有不同程度降低,并得出了有工程应用价值的 Nu-Re 及 f-RE 准则关系式,可为原表面回热器的设计制造提供参考.
An experimental study of flow and heat transfer characteristics of a CW primary surface recuperator for a 100 kW microturbine is implemented. The influence of gas mass flow rate, gas inlet temperature and air inlet pressure on heat transfer and pressure drop performance is investigated by measuring the temperature and pressure in the inlet and outlet, it is found that the fluid distribution is uniform in a CW primary surface recuperator, the heat transfer effectiveness is improved and the air and gas pressure drops are decreased in different degrees. The correlations of Nusselt numbers and friction factors vs. Reynolds numbers are obtained, the result can be referenced for the design and manufacture of the CW primary surface recuperators.
参考文献
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