Key issues of ultraviolet radiation of OH at high altitudes
文献类型：会议论文
| 作者 | Yuhuai Zhang(张羽淮); Tian Wan(万田); Jianzheng Jiang(蒋建政); Jing Fan(樊菁); Fan J(樊菁) ; Zhang YH(张羽淮); Zhang YH(张羽淮); Zhang YH(张羽淮); Wan T(万田); Wan T(万田)
|
| 出版日期 | 2014-12 |
| 会议名称 | the 29th International Symposium on Rarefied Gas Dynamics |
| 会议日期 | July13-18, 2014 |
| 会议地点 | Xi'an, China |
| 中文摘要 | Ultraviolet (UV) emissions radiated by hydroxyl (OH) is one of the fundamental elements in the prediction of radiation signature of high-altitude and high-speed vehicle. In this work, the OHA2Σ+→X2Π ultraviolet emission band behind the bow shock is computed under the experimental condition of the second bow-shock ultraviolet flight (BSUV-2). Four related key issues are discussed, namely, the source of hydrogen element in the high-altitude atmosphere, the formation mechanism of OH species, efficient computational algorithm of trace species in rarefied flows, and accurate calculation of OH emission spectra. Firstly, by analyzing the typical atmospheric model, the vertical distributions of the number densities of different species containing hydrogen element are given. According to the different dominating species containing hydrogen element, the atmosphere is divided into three zones, and theformation mechanism of OH species is analyzed in the different zones. The direct simulationMonte Carlo (DSMC) method and the Navier-Stokes equations are employed to compute thenumber densities of the different OH electronically and vibrationally excited states. Different to the previous work, the trace species separation (TSS) algorithm is applied twice in order to accurately calculate the densities of OH species and its excited states. Using a non-equilibriumradiation model, the OH ultraviolet emission spectra and intensity at different altitudes are computed, and good agreement is obtained with the flight measured data |
| 收录类别 | CPCI |
| 会议网址 | http://dx.doi.org/10.1063/1.4902725 |
| 会议录 | AIP Conf. Proc. 1628
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| 源URL | [http://dspace.imech.ac.cn/handle/311007/49473]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yuhuai Zhang,Tian Wan,Jianzheng Jiang,et al. Key issues of ultraviolet radiation of OH at high altitudes[C]. 见:the 29th International Symposium on Rarefied Gas Dynamics. Xi'an, China. July13-18, 2014.http://dx.doi.org/10.1063/1.4902725. |
入库方式： OAI收割
来源：力学研究所
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