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Modification method of numerical calculation of heat flux over dome based on turbulence models
Zhang DJ(张代军); Luo HB(罗海波); Zhang JC(张俊超); Zhang XY(张祥越)
作者部门光电信息技术研究室
会议名称International Symposium on Infrared Technology and Application and the International Symposiums on Robot Sensing and Advanced Control
会议日期May 9-11, 2016
会议地点Beijing
会议录名称Proceedings of SPIE - The International Society for Optical Engineering
出版者SPIE
出版地Bellingham, WA
2016
页码1-7
收录类别EI ; CPCI(ISTP)
EI收录号20170503310027
WOS记录号WOS:000391228600119
产权排序1
ISSN号0277-786X
ISBN号978-1-5106-0772-9
关键词Heat Flux Entropy Increase Vortex Disturbance Free Stream Boundary Condition Equivalent Thermal Conductivity
摘要For the optical guidance system flying at low altitude and high speed, the calculation of turbulent convection heat transfer over its dome is the key to designing this kind of aircraft. RANS equations-based turbulence models are of high computation efficiency and their calculation accuracy can satisfy the engineering requirement. But for the calculation of the flow in the shock layer of strong entropy and pressure disturbances existence, especially of aerodynamic heat, some parameters in the RANS energy equation are necessary to be modified. In this paper, we applied turbulence models on the calculation of the heat flux over the dome of sphere-cone body at zero attack. Based on Billig’s results, the shape and position of detached shock were extracted in flow field using multi-block structured grid. The thermal conductivity of the inflow was set to kinetic theory model with respect to temperature. When compared with Klein’s engineering formula at the stagnation point, we found that the results of turbulent models were larger. By analysis, we found that the main reason of larger values was the interference from entropy layer to boundary layer. Then thermal conductivity of inflow was assigned a fixed value as equivalent thermal conductivity in order to compensate the overestimate of the turbulent kinetic energy. Based on the SST model, numerical experiments showed that the value of equivalent thermal conductivity was only related with the Mach number. The proposed modification approach of equivalent thermal conductivity for inflow in this paper could also be applied to other turbulence models.
语种英语
引用统计
文献类型会议论文
条目标识符http://ir.sia.cn/handle/173321/19482
专题光电信息技术研究室
通讯作者Zhang DJ(张代军)
作者单位1.Shenyang Institute of Automation, Chinese Academy of Science, Shenyang, 110016, China
2.University of Chinese Academy of Science, Beijing, 100049, China
3.Key Laboratory of Optical-Electronics Information Processing, Chinese Academy of Science, Shenyang, 110016, China
4.Key Laboratory of Image Understanding and Computer Vision, Shenyang, 110016, China
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GB/T 7714
Zhang DJ,Luo HB,Zhang JC,et al. Modification method of numerical calculation of heat flux over dome based on turbulence models[C]. Bellingham, WA:SPIE,2016:1-7.
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