Research On Heat Transfer Of Flame Tube Wall With Multi-inclined Holes And Development Of Software On Wall Temperatures Design With 1d Method

In order to improve the specific power of modern gas turbine, temperature in combustion chamber must be improve as much as possible under the circumstances permitted by the strength of the material. Launched the flame tube wall is currently used in high-temperature alloy materials, the maximum allowable temperature is about 1300K, while the maximum temperature of gas in flame tube reached 2400K. In order to ensure the safety of flame tube, an effective cooling must be use on it.Full-coverage film cooling is a more advanced wall cooling method. It has already started a lot of research on Full-coverage film cooling interiorly and abroad, but the innovative technique enhancing the film cooling efficiency is also regarded as a challenging problem.In connection with Film Cooling of Multi-Inclined holes wall, this paper mainly research on two aspects:Firstly, at the same circumstances, this paper did a numerical research on Film Cooling Effectiveness by different mixing angles while the inject angle is 20°. By systematically analyzed the influences by mixing angles on mainstream's temperature, pressure, density, velocity, and Film Cooling Effectiveness, that when the mixing angle is 60°, the integrated Cooling Effect is the best.Secondly, based on the recognized concludes, this paper composed a semi-theoretical and semi-empirical One-dimensional program to calculate the temperatures of flame tube wall.