Yifeng Zhang, Yong Cao, Yu Feng, Deming Zhang, J. Qin
{"title":"Investigation into Effect of Residence Time on Cooling Characteristics of RP-3","authors":"Yifeng Zhang, Yong Cao, Yu Feng, Deming Zhang, J. Qin","doi":"10.2514/1.t6556","DOIUrl":null,"url":null,"abstract":"Efficient utilization of chemical heat sinks and enhancement of heat transfer are key issues for the thermal protection of advanced hypersonic flight vehicles. However, the influences of residence time on the pyrolysis and convection heat transfer of hydrocarbon fuel are different, which is important for the design and optimization of cooling systems. Therefore, a multidimensional numerical simulation model based on a molecular reaction model of aviation kerosene, RP-3, is established. This model reveals that the residence time has a great influence on the heat sink and heat transfer characteristics under the supercritical condition. With the increase of the residence time, the chemical heat sink and physical heat sink increase, whereas the convective heat transfer coefficient decreases. The heat transfer is not only affected by flow structures but also by the ratio of the chemical heat sink to the physical heat sink. With the increase of the residence time, this ratio first increases and then decreases. It has a maximum value, and the residence time corresponding to this maximum value is exactly the residence time when the total chemical heat sink rate reaches the maximum. A correlation predicting the maximum heat sink ratio is proposed based on these data.","PeriodicalId":17482,"journal":{"name":"Journal of Thermophysics and Heat Transfer","volume":" ","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Thermophysics and Heat Transfer","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.2514/1.t6556","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 2
Abstract
Efficient utilization of chemical heat sinks and enhancement of heat transfer are key issues for the thermal protection of advanced hypersonic flight vehicles. However, the influences of residence time on the pyrolysis and convection heat transfer of hydrocarbon fuel are different, which is important for the design and optimization of cooling systems. Therefore, a multidimensional numerical simulation model based on a molecular reaction model of aviation kerosene, RP-3, is established. This model reveals that the residence time has a great influence on the heat sink and heat transfer characteristics under the supercritical condition. With the increase of the residence time, the chemical heat sink and physical heat sink increase, whereas the convective heat transfer coefficient decreases. The heat transfer is not only affected by flow structures but also by the ratio of the chemical heat sink to the physical heat sink. With the increase of the residence time, this ratio first increases and then decreases. It has a maximum value, and the residence time corresponding to this maximum value is exactly the residence time when the total chemical heat sink rate reaches the maximum. A correlation predicting the maximum heat sink ratio is proposed based on these data.
期刊介绍:
This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.