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 °C for 40 s at the alumina droplet speed of 1200 m s−1. Two incident angle of 0° and 30° 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° resulted in higher deposited alumina layer as well as lower erosion rate.