Studies of Jet Diffusion Flames Using Particle Image Velocimetry (PIV ) and Planar Laser-Induced Fluorescence (PLIF)

使用粒子图像测速 (PIV) 和平面激光诱导荧光 (PLIF) 研究射流扩散火焰

• 批准号: 0070425
• 负责人: Mark Godfrey Mungal
• 金额: $ 25.51万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070425&HistoricalAwards=false
• 关键词: Studies; Jet; Diffusion; Flames; Using

This is a study of fundamental properties of turbulent jet diffusion flames. New strategies are applied for using both particle image velocimetry (PIV) and plasma laser-induced fluorescence (PLIF), separately or simultaneously, to provide measurements useful for understanding flame phenomena or for validating numerical computations. Flame stabilization measurements are made from lift-off condition to near-blowout conditions to investigate the applicability of the recent discovery of low-speed stabilization of edge flames to blowout conditions. A novel PIV method is used for the measurements of entrainment into a jet in coflow that eliminates the uncertainties that occur when reaction takes place and can provide the entrainment coefficient as a function of the jet Reynolds number, Froude number, and axial distance downstream. Measurements of CH are made to examine the nature of the actual flame surface over a number of variables including jet velocity, coflow speeds, and the influence of buoyancy. This effort is coordinated with the NASA Stanford Center for Turbulence Research which is attempting to apply large-eddy simulation (LES) to coflow flames.

本文是对湍流射流扩散火焰基本特性的研究。 新的策略适用于使用粒子图像测速（PIV）和等离子体激光诱导荧光（PLIF），单独或同时，提供测量有用的理解火焰现象或验证数值计算。 火焰稳定的测量是从起飞条件到近井喷条件调查的适用性，最近发现的低速稳定的边缘火焰井喷条件。 一种新的PIV方法用于测量夹带到射流中的同向流，消除了发生反应时发生的不确定性，并可以提供夹带系数作为射流雷诺数，弗劳德数和轴向距离下游的函数。 CH的测量是为了研究实际火焰表面的性质，包括射流速度，同向流速度和浮力的影响等变量。 这项工作是与美国宇航局斯坦福大学湍流研究中心协调进行的，该中心正试图将大涡模拟（LES）应用于同向流火焰。