Scholarlink

Modeling of Nitric Oxide (NO) vibrational states in hypersonic reentry flows is necessary to interpret emission and absorption spectra. To that end, the vibrational relaxation number, \(Z_v^C\) , is an important parameter in the Larsen-Borgnakke (LB) model which is used to express vibrational relaxation rates for collisions. In this work, we use rates obtained from Quasi-Classical Trajectory (QCT) calculations of Andrienko et al. [2] for the NO-O vibrational relaxation process to arrive at a new fit for the \(Z_v^C\) parameter. This new fit for \(Z_v^C\) is implemented in Direct Simulation Monte Carlo (DSMC) calculations for the case of hypersonic flow over a cylinder where the effect of the new fit on NO macroparameters and vibrational state populations is studied.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Calibration of the Larsen-Borgnakke Model for NO-O Vibrational Relaxation

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

查看全文
  • Shubham Thirani,
  • Deborah A. Levin,
  • Ingrid J. Wysong

摘要

Modeling of Nitric Oxide (NO) vibrational states in hypersonic reentry flows is necessary to interpret emission and absorption spectra. To that end, the vibrational relaxation number, \(Z_v^C\) , is an important parameter in the Larsen-Borgnakke (LB) model which is used to express vibrational relaxation rates for collisions. In this work, we use rates obtained from Quasi-Classical Trajectory (QCT) calculations of Andrienko et al. [2] for the NO-O vibrational relaxation process to arrive at a new fit for the \(Z_v^C\) parameter. This new fit for \(Z_v^C\) is implemented in Direct Simulation Monte Carlo (DSMC) calculations for the case of hypersonic flow over a cylinder where the effect of the new fit on NO macroparameters and vibrational state populations is studied.