Transpiration cooling during ultra-high temperature erosion

In present study the static firing of the bi-propellant engine has been employed to investigate the transpiration cooling phenomenon of W-Cu materials during ultra-high erosion against liquid alumina droplets. For this purpose, two samples of W-10 wt% Cu composite were prepared by sintering+infiltration method. The erosion test carried out at 3000 degrees C for 40 s at the alumina droplet speed of 1200 m s (1). Two incident angle of 0 degrees and 30 degrees selected to study the effect of erosion angle on transpiration cooling. The microstructure evolutions were studied by SEM and EDS. The obtained results exhibited that erosion at 30 degrees resulted in higher deposited alumina layer as well as lower erosion rate. (C) 2017 Elsevier B.V. All rights reserved.