SUPERSONIC COMBUSTION AND ITS APPLICATION IN HYPERSONIC JET ENGINES (SPALANIE NADDZWIEKOWE ORAZ JEGO ZASTOSOWANIE W HIPERSONICZNYCH SILNIKACH STRUMIENIOWYCH)

Processes taking place during supersonic combustion of an air- hydrogen gas mixture are discussed on a theoretical basis. Attempts to analyze these phenomena are supported by results on the research. Two fundamental types of supersonic combustion are distinguished combustion controlled by the mixture formation processes, and shock induced. In the first type of combustion, the gaseous fuel is injected trangentially into the air jet at a rate and pressure similar to those of the air. If the temperature and pressure of the mixture are sufficiently high, spontaneous combustion occurs and the burning velocity is a function of the diffusion rate of the fuel and air jets. If the air temperature and pressure and low, supersonic combustion must be initiated by some type of ignition e.g., with a preheated fuel jet. This process is considered to be heat convection controlled supersonic combustion. Both of these processes are studied and described in detail. Shock inducted combustion, which takes place when air and gaseous fuel are mixed in the supersonic jet and are ignited by the shock wave causing a rise in pressure and temperature is treated in more general terms.