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Recently,a number of environmental problems caused from fossil fuel combustion have been focused on.Inaddition,with the eventual depletion of fossil energy resources,hydrogen gas is expected to be an alternativeenergy resource in the near future.It is characterized by high energy per unit weight,high reaction rate,widerange of flammability and the low emission property.On the other hand,many researches have been underway inseveral countries to improve a propulsion system for an advanced aircraft.The system is required to have higherpower,lighter weight and lower emissions than existing ones.In such a future propulsion system,hydrogen gaswould be one of the promising fuels for realizing the requirements.Considering these backgrounds,our group hasproposed a new cycle concept for hydrogen-fueled aircraft propulsion system.In the present study,we perform 3dimensional computations of turbulent flow fields with hydrogen-fueled combustion around a turbine blade.Themain objective is to clarify the influence of arrangement of hydrogen injector holes.Changing the chordwise andspanwise spacings of the holes,the 3 dimensional nature of the flow and thermal fields is numerically studied.
Recently, a number of environmental problems caused from fossil fuel combustion have been focused on. Addition, with the eventual depletion of fossil energy resources, hydrogen gas is expected to be an alternative energy resource in the near future. It is characterized by high energy per unit weight, high reaction rate, widerange of flammability and the low emission property. On the other hand, many researches have been underway inseveral countries to improve a propulsion system for an advanced aircraft. The system is required to have higherpower, lighter weight and lower emissions than existing ones. such a future propulsion system, one of the promising fuels for realizing the requirements. Citiesidering these backgrounds, our group hasproposed a new cycle concept for hydrogen-fueled aircraft propulsion system.In the present study, we perform 3dimensional computations of turbulent flow fields with hydrogen-fueled combustion around a turbine blade. Mainmain is to clarify the influence of arrangement of hydrogen injector holes. Changing the chordwise and spanwise spacings of the holes, the 3 dimensional nature of the flow and thermal fields is numerically studied.