Extended Continuum Models for Transient and Rarefied Hypersonic Aerothermodynamics

瞬态和稀薄高超声速空气热力学的扩展连续体模型

• 批准号: EP/F014155/1
• 负责人: Jason Reese
• 金额: $ 39.98万
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF014155%2F1
• 关键词: Extended; Continuum; Models; Transient; Rarefied

The aerodynamic design of hypersonic vehicles envisaged for future defence applications, and UK-partnered planetary exploration plans (e.g. ExoMars in ESA's Aurora programme), is a major challenge due to the strong viscous effects (very high local heating rates and shock/shock interactions), the rarefaction phenomena characteristic of mixed-density flowfields, and the real-gas effects of high temperature (vibrational excitation, dissociation and ionization). Conventional fluid dynamics is often unsuitable for many aerothermodynamic situations, while statistical molecular dynamics is computationally too intensive. To address these twin problems we propose deploying extended hydrodynamics alongside a new continuum-fluid description of the non-equilibrium thermochemistry that incorporates both rarefaction and surface-catalycity. Extended hydrodynamics comprises high-order additions to the Navier-Stokes model that correct for rarefaction. It combines the computational efficiency of continuum-flow models with the major advantage that it reduces to the conventional Navier-Stokes model in near-equilibrium conditions.This is a new collaboration between Daresbury Laboratory and Strathclyde and Warwick Universities with the goal of building a new UK capability in high-speed mixed-density aerodynamic modelling. It is a Joint Grant Scheme proposal with the MoD's Defence Science and Technology Laboratory (Dstl), with additional support from MBDA and FGE. Dstl will provide experimental and computational data to help validate our models. They will also co-host with the applicants a one-day open workshop on high-speed flow modelling, which will act as a forum to discuss the future growth and direction of the UK high-speed flow research community.

设想用于未来国防应用的高超声速飞行器的空气动力学设计以及英国合作的行星探索计划(例如欧空局极光计划中的ExoMars)是一项重大挑战，原因是强粘性效应(非常高的局部加热率和激波/激波相互作用)、混合密度流场特有的稀薄现象以及高温的真实气体效应(振动激发、解离和电离)。传统的流体动力学往往不适用于许多空气热力学的情况，而统计分子动力学的计算过于密集。为了解决这两个问题，我们建议将扩展的流体力学与非平衡热化学的新的连续流体描述结合在一起，该描述结合了稀疏化和表面催化。扩展流体力学包括对纳维-斯托克斯模型的高阶加法，修正了稀疏性。它结合了连续流模型的计算效率和在近平衡条件下简化为传统的Navier-Stokes模型的主要优势。这是达累斯伯里实验室与斯特拉斯克莱德大学和华威大学的新合作，目标是建立英国在高速混合密度空气动力学模拟方面的新能力。这是一项与国防部国防科学技术实验室(DSTL)联合资助计划的提案，并得到了MBDA和FGE的额外支持。DSTL将提供实验和计算数据来帮助验证我们的模型。他们还将与申请者共同主办为期一天的高速流动建模开放研讨会，该研讨会将作为一个论坛，讨论英国高速流动研究社区的未来增长和方向。

项目成果

The structure of hypersonic shock waves using Navier-Stokes equations modified to include mass diffusion

使用经过修改以包含质量扩散的纳维-斯托克斯方程的高超音速冲击波结构

• 作者: Christopher Greenshields (Co-Author)

Numerical investigation of slip velocity and temperature jump boundary conditions in rarefied hypersonic flow

稀薄高超声速流中滑移速度和温跃边界条件的数值研究

• 作者: Nam Tuan Phuong Le (Co-Author)

Rarefied hypersonic flow simulations using the Navier-Stokes equations with non-equilibrium boundary conditions

• DOI: 10.1016/j.paerosci.2011.08.001
• 发表时间: 2012-07
• 期刊: Progress in Aerospace Sciences
• 影响因子: 9.6
• 作者: C. J. Greenshields;J. Reese

Implementation of semi-discrete, non-staggered central schemes in a colocated, polyhedral, finite volume framework, for high-speed viscous flows

• DOI: 10.1002/fld.2069
• 发表时间: 2010-05-10
• 期刊: INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
• 影响因子: 1.8
• 作者: Greenshields, Christopher J.;Weller, Henry G.;Reese, Jason M.
• 通讯作者: Reese, Jason M.