Performance of the Two-Dimensional Diffusers with Suction at the Entrance

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概要

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• Experimental studies were carried out on the caracteristics of diffusers of rectangular cross section which have an angle of expansion 2θ=30°, 60°, 90°, and 180° and an area ratio of 4. Remarkabel improvement of the pressure coefficient and energy loss coefficient is achieved by means of suction at the entrance. It is found that the most effective position of suction is at the point right down stream of the corner. The diffuser efficiency increases with increase of aspect ratio. The efficiency, however, tends to be constant as the aspect ratio exceeds four. When the angle of expansion is 20°, 30°, 60°, and 90°, the rate of optimum suction is 3 to 4 per cent of the total flow rate. With this optimum suction, the efficiency of these wide angle diffusers approaches that of the diffuser of 2θ=10°.

• 一般社団法人日本機械学会の論文

著者

• Furuya Yoshimasa

  Faculty Of Engineering Nagoya University

• FUJIMOTO Tetsuo

  Faculty of Engineering, Nagoya University

• YAMAZATO Eisho

  Faculty of Engineering, University of Ryukyus.

• TSUZUKI Isao

  Faculty of Engineering, Nagoya University

• NISHIURA Ichiro

  Mitsubishi Heavy Industry, Co.

• Tsuzuki Isao

  Faculty Of Engineering Nagoya University

• Yamazato Eisho

  Faculty Of Engineering University Of Ryukyus.

• Nishiura Ichiro

  Mitsubishi Heavy Industry Co.

• Fujimoto Tetsuo

  Faculty Of Engineering Nagoya University

• FURUYA Yoshimasa

  Faculty of Engineering , Nagoya University

関連論文

• The spanwise non-uniformity of nominally two-dimensional turbulent boundary layer : 4th Report, Uniformalization of flow field and Comparison of various flows
• The spanwise non-uniformity of nominally two-dimensional turbulent boundary layer : 3rd Report, Influence of the streamwise vortices arising from the protrusion
• The spanwise non-uniformity of nominally two-dimensional turbulent boundary layer : 2nd Report Wall shear stress and flow field
• Experiments on the Relatively Thick, Turbulent Boundary Layers on a Rotating Cylinder in Axial Flows : 2nd Report, Flows under Pressure Gradients
• Turbulent Boundary Layers on plates Roughened by Wires at Equal Intervals
• Turbulent Boundary-Layer along a Streamwise Bar of a Rectangular Cross Section Placed on a Flat Plate
• Turbulent Boundary-Layer along a Streamwise Bar of a Square Cross Section Placed on a Flat Plate
• Turbulent Boundary Layers on Wire-Screen Roughnesses
• The Loss of Flow in the Conical Diffusers with Suction at the Entrance
• On the Racing Power of Impellers
• The Experiment on the Skewed Boundary Layer on a Rotating Body
• The spanwise non-uniformity of nominally two-dimensional turbulent boundary layer : 1st Report Characteristics of spanwise velocity distribution
• Performance of the Two-Dimensional Diffusers with Suction at the Entrance
• An Experimental Investigation of the Skewed Boundary Layer on a Rotating Body (2nd Report)
• The Rotating Flows in a Vaneless Diffuser Having Two Parallel Discs
• Pressure Recovery Efficiency of Short Conical Diffusers and of Roughened Diffusers
• Heat Transfer in the Rarefied Gases (I)
• Heat Transfer in the Rarefied Gases (II)

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