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15 janv. 2024 · Although two-dimensional electron gases have been realized in a number of semiconductor surfaces, examples of two-dimensional hole gases (2DHG) - the counterpart to 2DEG - are still very limited. Besides, owing to the deep energy level nature of potential dopants, achieving acceptor p -type β- Ga 2 O 3 is a well-known challenge so far.
Gas Turbine Film Cooling. D. Bogard, K. Thole. Published 1 March 2006. Engineering, Materials Science. Journal of Propulsion and Power. The durability of gas turbine engines is strongly dependent on the component temperatures. For the combustor and turbine airfoils and endwalls, film cooling is used extensively to reduce component temperatures.
23 juil. 2020 · The result of the study showed that the CA film hole oriented at 60° and 90° has delivered higher spanwise averaged FCE across the lateral axis of the test surface for both low to high IR. Gao et al. carried out a numerical investigation to analyze the performance of the CA film hole embedded on the gas turbine guide vane LE model.
1 févr. 2019 · The simulation domain is 110mm in length, 12mm in width, the height of cold channel is 10mm, the hot channel width is 30mm. The flat plat length H=1~3mm, the film cooling hole angle α=30~90°. The hole shape is cylindrical with a diameter of D=1mm. The inclined holes are discrete in a single row with a pitch of P=4 mm.
23 mai 2012 · Effects of Trenched Film Hole Configurations on the Endwall Film Cooling and Suction Side Phantom Cooling 28 August 2019 | Journal of Thermal Science, Vol. 28, No. 5 Experimentally measured effects of height and location of the vortex generator on flow and heat transfer characteristics of the flat-plate film cooling
3 août 2009 · The film cooling hole arrangement simulates a typical film cooled blade design used in stage 1 rotor blades for gas turbines used for power generation. A minimum blowing ratio is defined for each film hole row and tests are performed for 1.0x, 1.33x, 1.67x, 2.0x and 2.67x of this minimum value. Tests are performed for an inlet Mach number of 0. ...
10 juin 2019 · Film holes for four-hole configurations have the same inlet diameter of 8 mm. The adiabatic film cooling effectiveness for each hole configuration is analyzed for varying blowing ratios ( M = 0.25, 0.5, 0.75, and 1.0). Results show that the best cooling performance for the conical and fan-shaped holes is obtained at the blowing ratio of 0.75.
