CAREER: Shock-Tube Investigation of the Richtmyer-Meshkov Instability and Integration of Classroom Lectures and Computer and Laboratory Activities

职业：Richtmyer-Meshkov 不稳定性的激波管研究以及课堂讲座、计算机和实验室活动的整合

• 批准号: 9734384
• 负责人: Riccardo Bonazza
• 金额: $ 31万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-15 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9734384&HistoricalAwards=false
• 关键词: CAREER; Shock; Tube; Investigation; Richtmyer

ABSTRACT Proposal Number: CTS-9734384 Principle Investigator: Bonazza This is a Career Award to conduct experiments to study the evolution of the instability developing at a fluid interface accelerated by strong shock-waves (up to M = 4 in atmospheric air). The experiments will be carried out in a new vertical, square shocktube of large (25 x 25 cm) cross section. The time evolution (at both the early, linear and late, non-linear stages) of interfaces with various density ratios will be studied, for several values of the incident shock's Mach number. Both continuous (gravitationally stratified) and discontinuous (membrane-based) interfaces will be studied. The study of the evolution of the interface (with particular emphasis placed on the growth rates of its perturbations and thickness) will be based on high spatial resolution, quantitative imaging of planar, vertical cross sections of the interface. Diagnostic techniques will include planar laser induced fluorescence (PLIF) and Rayleigh scattering, both to be implemented with a pulsed ND:YAG laser. This topic represents an important unresolved problem in fluid mechanics. It is related to the overturn of supernova cores, reactive and non-reactive mixing processes in industrial settings and laser-implosion of microtargets in inertial-confinement fusion experiments.

摘要 提案编号：CTS-9734384 主要研究者：Bonazza 这是一个职业奖，进行实验，以研究在强冲击波（在大气中高达M = 4）加速的流体界面处发展的不稳定性的演变。 实验将在一个新的垂直、方形、大横截面（25 × 25厘米）激波管中进行。 对于入射激波马赫数的几个值，将研究具有不同密度比的界面的时间演化（在早期线性阶段和晚期非线性阶段）。 将研究连续（重力分层）和不连续（膜基）界面。 对界面演变的研究（特别强调其扰动和厚度的增长率）将以高空间分辨率为基础，对界面的平面和垂直横截面进行定量成像。 诊断技术将包括平面激光诱导荧光（PLIF）和瑞利散射，两者都将与脉冲ND：YAG激光器实施。 这是流体力学中一个重要的未解决的问题。 它与超新星核心的翻转、工业环境中的反应性和非反应性混合过程以及惯性约束聚变实验中微靶的激光内爆有关。