References
[1] Shlichting,” Boundary layer theory “ , McGraw – Hill co. New York 1968.
[2] Chrome, P. K, “ Separation of flow “ , Vol. . 3, Pergamon Press Inc.1970.
[4] Hoadley, D. , “Boundary layer development in annular diffusers “ ,Symposium in Internal Flows , University of Slavered , April 1970 .
[4] Asim H. Y. ,” Lecture notes”; Al-Rasheed college for engineering & science – Ex- MEC; 1992
[5] Okwoubi, P. A. C, and R. S, Azad, “ Turbulence in conical diffuser with fully developed flow at entry, “ J. Fluid Mechanics, Vol. 57, PP603 – 622; 1973.
[6] Qin, Y Zhu and D I Poli, “Surface suction on airfoil aerodynamicCharacteristics at Transonic Speeds”; ImehE 1998.
[7] Mohamad Yamin “Control of Flow Separation” , Institute of Aeronauticsand Astronautics, TU-Berlin, Germany.2000
Tikrit Journal of Engineering Sciences (2007) 14(4) 66-86
An Experimental Verification of The Effect of Boundary Layer Suction on The Different Angle Diffusers
Fraih K. Hummad | Abdullateef A. Jadallah |
Mechanical Dept., Anbar Technical Institute, Iraq | Technical Education Dept., University of Technology, Iraq |
Abstract
The work described in this research is concerned mainly with the experimental verification of the effect of boundary layer suction on the diffuser performance having three different divergence angles. The test facility has been designed so as to permit different values of suction velocities (0, 0.386, 4.88 and 6.365 m/sec). The static pressure and total pressure were measured by pitot – static tube and inclined manometer. The application of boundary layer suction was found to increase the pressure recovery and hence increase the diffusion efficiency. An improvement in pressure recovery was found to be more significant for diffuser having divergence angle (15o).The maximum percentage improvement in pressure recovery obtained is (34.7 %). The study of B.L control through its suction leads to better understanding of the flow geometrical design and parameters.
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Keywords: Boundary Layer, Suction, Diffuser Performance, Pressure Recovery.