Modification method of numerical calculation of heat flux over dome based on turbulence models
文献类型：会议论文
| 作者 | Zhang DJ(张代军); Luo HB(罗海波) ; Zhang JC(张俊超); Zhang XY(张祥越)
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| 出版日期 | 2016 |
| 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 |
| 关键词 | heat flux entropy increase vortex disturbance free stream boundary condition equivalent thermal conductivity |
| 页码 | 1-7 |
| 通讯作者 | 张代军 |
| 中文摘要 | 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. |
| 收录类别 | EI ; CPCI（ISTP） |
| 产权排序 | 1 |
| 会议录 | Proceedings of SPIE - The International Society for Optical Engineering
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| 会议录出版者 | SPIE |
| 会议录出版地 | Bellingham, WA |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 978-1-5106-0772-9 |
| WOS记录号 | WOS:000391228600119 |
| 源URL | [http://ir.sia.cn/handle/173321/19482]  |
| 专题 | 沈阳自动化研究所_光电信息技术研究室 |
| 推荐引用方式 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]. 见:International Symposium on Infrared Technology and Application and the International Symposiums on Robot Sensing and Advanced Control. Beijing. May 9-11, 2016. |
入库方式： OAI收割
来源：沈阳自动化研究所
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