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In these years,a lot of environmental problems such as air pollution and exhaustion of fossil fuels have been dis- cussed intensively.In our laboratory,a hydrogen-fueled propulsion system has been researched as an alternative to conventional systems.A hydrogen-fueled propulsion system is expected to have higher power,lighter weight and lower emissions.However,for the practical use,there exist many problems that must be overcome.Consid- ering these backgrounds,jet engines with hydrogen-fueled combustion within a turbine blade passage have been studied.Although some studies have been made on injecting and burning hydrogen fuel from a stator surface,lit- tle is known about the interaction between a tip leakage vortex near the suction side of a rotor tip and hydro- gen-fueled combustion. The purpose of this study is to clarify the influence of the tip leakage vortex on the characteristics of the 3-dimensional flow field with hydrogen-fueled combustion within a turbine blade passage.Reynolds-averaged compressible Navier-Stokes equations are solved with incorporating a k-ε turbulence and a reduced chemical mechanism models.Using the computational results,the 3-dimensional turbulent flow field with chemical reac- tions is numerically visualized,and the three-dimensional turbulent flow fields with hydrogen combustion and the structure of the tip leakage vortex are investigated.
In these years, a lot of environmental problems such as air pollution and exhaustion of fossil fuels have been dis- cussed intensively. In our laboratory, a hydrogen-fueled propulsion system has been researched as an alternative to conventional systems. A hydrogen-fueled propulsion system is expected to have higher power, lighter weight and lower emissions. Host, for the practical use, there exist many problems that must be overcome. Carsid-ering these backgrounds, jet engines with hydrogen-fueled combustion within a turbine blade have have been studied. Although some studies have been made on injecting and burning hydrogen fuel from a stator surface, lit- tle is known about the interaction between a tip leakage vortex near the suction side of rotor tip and hydro- gen-fueled combustion. of this study is to clarify the influence of the tip leakage vortex on the characteristics of the 3-dimensional flow field with hydrogen-fueled combustion within a turbine blade passage. Reynold s-averaged compressible Navier-Stokes equations are solved with incorporating a k-ε turbulence and a reduced chemical mechanism models. Using the computational results, the 3-dimensional turbulent flow field with chemical reac- tions is numerically visualized, and the three-dimensional turbulent flow fields with hydrogen combustion and the structure of the tip leakage vortex are investigated.