Transonic Testing of passive flow control techniques in the Pilot European Transonic Cryogenic Wind Tunnel

减少飞机燃料消耗，从而减少碳排放，对航空和整个社会都至关重要。要做到这一点，一种方法是减少飞机的阻力--飞行的空气阻力。如果飞机要在二氧化碳排放危害较小但空气密度较高的较低高度运行，情况尤其如此。要做到这一点，一种方法是采用被动(不需要能量输入)的方法来控制气流，以确保机翼激波被减弱，并且不会导致气流从机翼发散并变成湍流(分离)。一个由英国大学和工业界代表(空中客车、BAE系统、DSTL和航空航天技术研究所)组成的联合体将在科隆的欧洲低温跨音速风洞开展一项基础实验活动，以调查在小范围但具有代表性的机翼截面上的小尺度粗糙条是否可以有效地削弱机翼冲击波。

The reduction of aircraft fuel burn, which results in reduced carbon emissions, is of vital importance to aviation and society in general. One way to do this is to reduce the aircraft drag - the air resistance to its flight. This is particularly true if aircraft are to operate at lower altitude where CO2 emissions do less harm, but where air density is higher. One way to do this is to employ passive (requiring no energy input) methods to control the airflow to ensure that the wing shock waves are weakened and do not cause the flow to diverge from the wing and become turbulent (separation). A consortia of UK Universities and representatives from industry (Airbus, BAe Systems, DSTL and the Aerospace Technology Institute) will undertake a campaign of fundamental experiments at the cryogenic European Transonic Wind Tunnel in Cologne, to investigate whether strips of small scale roughness on a small scale, but representative wing section, can effectively act to weaken the wing shock wave.