二次成像法在风洞模型自由飞运动记录中的应用  

APPLICATION OF SECONDARY FOCUS METHOD IN WIND TUNNEL MODEL FREE FLIGHT

作　　者：马家驩[1] 潘文欣[1] 陈素贞[1] 

机构地区：[1]中国科学院力学研究所

出　　处：《气动实验与测量控制》1995年第4期59-63,共5页

摘　　要：风洞模型自由飞是一种无支杆干扰的非接触式气动特性测量方法。为获得相对于实验室固定坐标系的精确的模型姿态和位置测量值，必须在成像照片中有固定坐标系框架标志的清晰影像。本文描述了在高超声速脉冲风洞中模型自由飞运动记录中二次成像法的应用。以０．１ｍｍ细线所构成的正交实验室固定坐标框架置于模型运动记录的第一次成像面上，然后用高速鼓轮相机记录模型自由飞相对于坐标系运动的清晰照片，从而获得模型在高超声速（Ｍ＿∞＝９．９）流动条件下的静、动稳定性导数的有效结果。The model free flight method in wind tunnel is a non-intrusive way to measure the aerodynamic characteristics of a model. In order to obtain the accurate position and attitude of model related to a fixed coordination of laboratory, a clear photograph with fixed frame of coordination is needed. This paper describes the secondary focus method along with its sucessful application to model free flight in a hypersonic gun tunnel. Placing two orthogonal 0.lmm thin threads on the model's first focus plane of a f =375mm lens, then a high-speed drum camera is used to record the model's clear position together with the coordination. As a result, the static and dynamic stabilities of the model in hypersonic flow have been obtained in an impulse type hypersonic wind tunnel.

关 键 词：风洞 模型自由飞 二次成像法 自由飞行风洞 

分 类 号：V211.752[航空宇航科学与技术—航空宇航推进理论与工程]