Test research on icing characteristics of sensors and their influence laws
Icing detection is the premise and basis for the operation of aircraft icing protection systems,and it is the primary problem faced by icing protection.At present,the research on the probe icing process lacks the measured data,and the relevant laws need to be verified.Therefore,in order to simulate the real icing environment encountered by the aircraft more accurately,the large-scale icing wind tunnel was used to carry out experimental research on the icing characteristics of the sensor.A test method combining probe array distribution and ice shape repeatability verification was used,and online images,measured ice shape,and ice quality were utilized to reveal the detailed characteristics and changing rules of water droplets impacting the probe surface visually and quantitatively.The results show that the water collection coefficient on the cylinder surface of the probe first increases and then decreases along the axial direction,and there is an extreme point.The height of this point will gradually increase with the development of the wall boundary layer,and the variety ranges from 2 mm to 30 mm.In addition,each probe position has different sensitivity to changes in incoming flow parameters,and the points with higher icing quality and lower sensitivity to changes in attack angle will have better detection effects.The measured data and analysis in this paper can provide a basis for the accurate design of the sensor probe.
万方数据
维普
