Thermal feasibility of using methane or hydrogen fuel for direct cooling of a first-stage turbine stator /

The feasibility of cooling the first-stage turbine stator directly with cryogenic fuels is investigated based on a numerical heat transfer analysis of methane-and hydrogen-cooled vanes. An insulation barrier between the fuel cooling passages and the external vane surface was required to prevent adverse cooling conditions. The cooling configuration analyzed was that of tubular cooling passages embedded in insulation material surrounded by an outer vane shell. The results indicated that the turbine stator vanes could be adequately cooled with methane or hydrogen fuel at a 2490' F (1639K) local-hot-spot gas temperature.Work performed at Lewis Research Center.N70-42326.Cover title.Includes bibliographical references (p. 23-24).The feasibility of cooling the first-stage turbine stator directly with cryogenic fuels is investigated based on a numerical heat transfer analysis of methane-and hydrogen-cooled vanes. An insulation barrier between the fuel cooling passages and the external vane surface was required to prevent adverse cooling conditions. The cooling configuration analyzed was that of tubular cooling passages embedded in insulation material surrounded by an outer vane shell. The results indicated that the turbine stator vanes could be adequately cooled with methane or hydrogen fuel at a 2490' F (1639K) local-hot-spot gas temperature.Mode of access: Internet