The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform

Dirk Dipl Ing Dr Schroter - One of the best experts on this subject based on the ideXlab platform.

Jens Dr Ing Meintschel - One of the best experts on this subject based on the ideXlab platform.

B. N. Suresh - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Coolant injector configuration on film cooling effectiveness for Gaseous and liquid film Coolants
    Heat and Mass Transfer, 2011
    Co-Authors: S. R. Shine, Sanjay Kumar, B. N. Suresh
    Abstract:

    An experimental investigation is conducted to bring out the effects of Coolant injector configuration on film cooling effectiveness, film cooled length and film uniformity associated with Gaseous and liquid Coolants. A series of measurements are performed using hot air as the core gas and Gaseous nitrogen and water as the film Coolants in a cylindrical test section simulating a thrust chamber. Straight and compound angle injection at two different configurations of 30°–10° and 45°–10° are investigated for the Gaseous Coolant. Tangential injection at 30° and compound angle injection at 30°–10° are examined for the liquid Coolant. The analysis is based on measurements of the film-cooling effectiveness and film uniformity downstream of the injection location at different blowing ratios. Measured results showed that compound angle configuration leads to lower far-field effectiveness and shorter film length compared to tangential injection in the case of liquid film cooling. For similar injector configurations, effectiveness along the stream wise direction showed flat characteristics initially for the liquid Coolant, while it was continuously dropping for the Gaseous Coolant. For liquid Coolant, deviations in temperature around the circumference are very low near the injection point, but increases to higher values for regions away from the Coolant injection locations. The study brings out the existance of an optimum Gaseous film Coolant injector configuration for which the effectiveness is maximum.

Vladimir Sudakov - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Gaseous Coolant temperature on the transpiration cooling for porous wall in the supersonic flow
    International Journal of Heat and Mass Transfer, 2019
    Co-Authors: A. I. Leontiev, Andrei Saveliev, Boris Kichatov, Alexey Kiverin, Alexey Korshunov, Vladimir Sudakov
    Abstract:

    Abstract The problems of the transpiration cooling for porous wall in the supersonic flow is considered. The experimental results are presented for the porous wall temperature distribution along the mainstream, the Mach number of the stream was 2, and the total temperature was + 20 °C. The temperature of the air injected through the porous surface is varied in a wide range from - 12 °C to + 77 °C. It is established that depending on the temperature of injected gas several characteristic regimes can be distinguished. If the temperature of injected gas is less than a certain value then the temperature of the porous wall decreases along the flow. On the other hand, if the injected gas temperature is higher than a certain value, then the temperature of the porous wall increases downstream. In the intermediate range of temperatures of injected gas, the temperature profile along the flow has a minimum. The minimal temperature of the wall can be lower than the temperature of injected gas. The criteria for realization of different types of temperature profiles on the permeable porous surface in a high-speed gas flow are obtained on the base of simple phenomenological model.

S. R. Shine - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Coolant injector configuration on film cooling effectiveness for Gaseous and liquid film Coolants
    Heat and Mass Transfer, 2011
    Co-Authors: S. R. Shine, Sanjay Kumar, B. N. Suresh
    Abstract:

    An experimental investigation is conducted to bring out the effects of Coolant injector configuration on film cooling effectiveness, film cooled length and film uniformity associated with Gaseous and liquid Coolants. A series of measurements are performed using hot air as the core gas and Gaseous nitrogen and water as the film Coolants in a cylindrical test section simulating a thrust chamber. Straight and compound angle injection at two different configurations of 30°–10° and 45°–10° are investigated for the Gaseous Coolant. Tangential injection at 30° and compound angle injection at 30°–10° are examined for the liquid Coolant. The analysis is based on measurements of the film-cooling effectiveness and film uniformity downstream of the injection location at different blowing ratios. Measured results showed that compound angle configuration leads to lower far-field effectiveness and shorter film length compared to tangential injection in the case of liquid film cooling. For similar injector configurations, effectiveness along the stream wise direction showed flat characteristics initially for the liquid Coolant, while it was continuously dropping for the Gaseous Coolant. For liquid Coolant, deviations in temperature around the circumference are very low near the injection point, but increases to higher values for regions away from the Coolant injection locations. The study brings out the existance of an optimum Gaseous film Coolant injector configuration for which the effectiveness is maximum.