Fundamental Studies of Turbulent Boundary Layers with Injection or Suction through Porous Walls : 2nd Report, Theoretical and Experimental Analysis of Turbulent Boundary Layers with Injection and Adverse Pressure Gradients

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概要

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• In this report, Truckenbrodt's method of analyzing the turbulent boundary layer with adverse pressure gradients has been extended to explain the properties of the turbulent boundary layers with injection. Applying the Truckenbrodt's method, and based on the fact of the One-Parameter Family advocated by Doenhoff and the others, the author intended to find a method of calculating the velocity profiles from the momentum thickness θ and the shape parameter H(=δ*/θ). As it was confirmed through many experiments that the concept of One-Parameter Family is applicable to the velocity profiles of turbulent boundary layers with injection, the author established a simple analytical method of calculating θand H from the momentum equation and the energy equation. Accordingly, the velocity profiles are easily determined as functions of given Reynolds number (R_x=u_0 x/ν). Here, the theoretical equations of θ and H were examined by the author, and it is confirmed that the semi-empirical values of θ and H are in good agreement with measured ones. Moreover shearing stress at the wall and frictional work in the turbulent boundary layer were examined for the turbulent boundary layer with injection.

• 一般社団法人日本機械学会の論文

著者

• Maeda Toshiyuki

  Faculty Of Engineering Tokyo Metropolitan University

• Maeda Toshiyuki

  Faculty Of Engineering Tokyo Metropolitan University.

関連論文

• Fundamental Studies on the Control of Turbulent Boundary Layers : 1st Report, Theoretical and Experimental Analyses of Velocity Profiles and Parameters with and without Adverse Pressure Gradient, with Uniform Suction through a Porous Flat Plate
• Study of Compressible High Speed Gas Flow in Piping System : 3rd Report, Flow Characteristics in Junctions
• A Simplified Method of the Cascade Test
• Fundamental Studies of Turbulent Boundary Layers with Injection or Suction through Porous Walls : 2nd Report, Theoretical and Experimental Analysis of Turbulent Boundary Layers with Injection and Adverse Pressure Gradients
• Fundamental Studies of Turbulent Boundary Layers with Injection or Suction through Porous Wall : 4th Report, Application of Fundamental Theoretical Analysis to Cascaded Blades with Injection or Suction and Cascade Tests
• Fundamental Studies of Turbulent Boundary Layers with Injection or Suction through Porous Wall : 3rd Report, Investigations on the Separation of Turbulent Boundary Layers in Strong Adverse Pressure Gradients with Injection through Porous Flat Plate

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