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风洞,是指在一个管道内,用动力设备驱动一股速度可控的气流,用以对模型进行空气动力实验的一种设备.最近位于四川绵阳的中国空气动力学研究和发展中心已建成2.4 m 跨声速风洞,这表明,我国已进入世界航空航天大国的行列.一、风洞——研制飞行器的先行官决定一架飞机或其他飞行器的飞行性能,如速度、高度等,除飞机重量、发动机推力等要素外,最重要的因素是作用于飞机的空气动力.空气动力主要决定于飞机的外形.在设计和研制飞机时,首先是设计其外形,由此就可以确定作用于飞机的空气动力并推算飞行性能.确定飞机空气动力的实验设备主要是风洞,人们把风洞和风洞试验叫做航空航天的先行官是恰如其分的.风洞实验的基本原理是相对性原理和相似性原理.根据相对性原理,飞机在静止的空气中飞行所受到的空气动力,与飞机静止不动、空气以同样的速度
A wind tunnel is a device that drives a stream of velocity-controllable airflow in a pipe to aerodynamically model a model. The China Aerodynamics Research and Development Center, recently located in Mianyang, Sichuan Province, has been completed 2.4 m transonic wind tunnel, which indicates that our country has entered the ranks of the world’s aerospace power.First, the wind tunnel - pioneer development of aircraft determines the flight performance of an aircraft or other aircraft, such as speed, altitude, etc., in addition to aircraft weight , Engine thrust and other factors, the most important factor is the aerodynamic force acting on the aircraft aerodynamic mainly depends on the aircraft’s shape.In the design and development of the aircraft, the first is to design its appearance, which can determine the role of the aircraft Aerodynamic and flight performance calculation.Airplane aerodynamic test equipment is mainly a wind tunnel, people wind tunnel and wind tunnel test called aerospace pioneer is appropriate.The basic principle of wind tunnel experiment is the principle of relativity and similarity According to the principle of relativity, the aerodynamics to which the aircraft is flying in still air, and the aircraft are stationary, the air is the same Speed