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A study on pressure drop and heat transfer in open cell metal foams for jet engine applications

机译：喷气发动机用开孔金属泡沫中的压降和传热研究

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This research investigated the feasibility of placing a ring of open cell metal foam between the combustor and the turbine section of a turbojet engine to homogenize the temperatures leaving the combustor to raise the overall efficiency of such engines. Heat transfer testing on Al foam samples was done using infrared imaging to test the foam's efficiency of mixing the hot and cool temperatures with very promising results (21 percent and 37 percent mixing factor in a 10 cm thick layer of 5 and 10 PPI foam, respectively). Pressure drop testing on Al foam was also done in the compressible region of air to investigate the loss of pressure through the foam. The tests concluded that when temperature effects where accounted for, the pressure drop was less than 34.5 KPa per 2.54 cm of foam.
机译：这项研究调查了在涡轮喷气发动机的燃烧器和涡轮部分之间放置开孔金属泡沫环以使离开燃烧器的温度均匀化以提高此类发动机的整体效率的可行性。使用红外成像对铝泡沫样品进行传热测试，以测试泡沫混合冷热温度的效率，并获得非常可观的结果（在10厘米厚的5和10 PPI泡沫层中混合系数分别为21％和37％） ）。还在空气的可压缩区域对铝泡沫进行了压降测试，以研究通过泡沫的压力损失。测试得出的结论是，考虑到温度影响后，每2.54厘米泡沫塑料的压降小于34.5 KPa。

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