Constant volume combustion chamber (CVCC) investigations of aerospace F-24 and Jet-A in low-temperature heat release and negative temperature coefficient regions
Constant volume combustion chamber (CVCC) investigations of aerospace F-24 and Jet-A in low-temperature heat release and negative temperature coefficient regions
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航空航天 F-24 和 Jet-A 低温放热和负温度系数区域的定容燃烧室 (CVCC) 研究
DOI：
10.1016/j.enconman.2022.115687
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发表时间：
2022
影响因子：
10.4
通讯作者：
Carapia, Cesar
中科院分区：
文献类型：
--
作者：
Soloiu, Valentin;Weaver, Amanda;Parker, Lily;Brant, Austin;Smith, Richard;Ilie, Marcel;Molina, Gustavo;Carapia, Cesar
以Jet-A为基准，在定容燃烧室中测定了航天F24发动机的低温放热特性、导数十六烷值和振动特性。F-24的着火延迟期和燃烧延迟期分别为4.04 ms和5.71 ms，DCN为43.77。JET-A的Dcn较大，为47，着火延迟期为3.35 ms，燃烧延迟期为5.14 ms。F24有一个扩展的冷火焰区域，在LTHR过程中释放出比Jet-A更多的能量，但NTCR比Jet-A短得多。从NVH分析中发现，ID和Cd相与它们各自的NVH谱之间存在很强的相关性。结果发现，Jet-A的振铃强度是F24的3倍。同时，喷流A产生的振动量比F24的S燃烧产生的振动量大约0.5 g，这与喷流A比F24产生更高的AHRR峰值和产生更高的振铃有很好的相关性。
A study was conducted to determine the characteristics of Low Temperature Heat Release, Derived Cetane Number, and the Vibrations, produced by the combustion of aerospace F24 using Jet-A as a baseline in a Constant Volume Combustion Chamber. The Ignition Delay and Combustion Delay for F-24 were found to be 4.04 ms and 5.71 ms with a DCN resulting at 43.77. Jet-A was found to have a larger DCN of 47 with an ignition delay and combustion delay of 3.35 ms and 5.14 ms. F24 has an extended region of cool flame and releases more of its energy during LTHR than Jet-A, however has a much shorter NTCR than that of Jet-A. From the NVH analysis it was found that there exists a strong correlation between the ID and CD phases and their respective NVH spectrum. It was found that the magnitude of the ringing for Jet-A was 3x higher than that of F24. Meanwhile, the magnitude of vibrations produced by Jet A was approximately 0.5 g greater than those produced by F24′s combustion which correlates well with the higher peak value of AHRR for Jet A and also with higher ringing produced by Jet A compared with F24.
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