ИССЛЕДОВАНИЕ ФОРСУНКИ ДЛЯ СИСТЕМЫ ИМИТАЦИИ ДОЖДЯ ПРИ СЕРТИФИКАЦИОННЫХ ИСПЫТАНИЯХ АВИАЦИОННЫХ ДВИГАТЕЛЕЙ

Abstract

The purpose of the study is to create a nozzle for testing aircraft engines to hit the rain, as well as to test the sample for compliance with the standard requirements for test facilities adopted for the certification of aircraft engines. In the research work, an overview of the problems and methods of liquid spraying was made, which became the basis for further choice of the liquid spraying scheme. The technique of carrying out pilot studies of the nozzle with the defi¬nition of such parameters as: coefficient of flow; Coefficient of uneven distribution of water; The root angle of the drip stream and the distribution of droplets along the diameters with the calculation of the mean median diameter. Also presented is a plant diagram for a comprehensive study of the characteristics of a drip water flow. According to the technique, pilot studies of pilot nozzles have been carried out to increase the integral efficiency parameters, as well as to verify compliance with the requirements for the range of droplet diameters from O.SUIO'^ to 7010'^ m and the mean median diameter 2.66010'^ m. The tests made it possible to identify the relationship between the geometric characteris¬tics of the injectors and the resulting droplet streams. The completion of the most suitable prototype nozzle allowed obtaining drops of the certification range with an average median diameter of 2,656-10'^ m. The results of the work - analyzed the problems of simulating the rain, a method for testing injectors was developed, the nozzle design was pro¬posed and justified. Experimental studies of its parameters were performed and compliance with certification require¬ments was confirmed.