Performance Analysis on Flow Through S Shaped Diffusers
Keywords:
Pressure recovery coefficient;, Pressure recovery efficiency;, Diffuser;, Reynolds numberAbstract
Many times due to space limitations it is necessary to decelerate and turn fluid simultaneously. For such requirement curved diffusers are being used. Five S shaped diffusers of turning angle 120o were fabricated. The area ratio was 2.5, 3.5, 4.5, 5.5 and 6.5. The pressure on the outer wall is more than that on the inner wall in the first curvature and less in the second curvature. Variation in actual pressure recovery coefficient (Cp) and pressure recovery efficiency (η) is not very much within the range of Reynolds number tested for a particular diffuser. As area ratio increases value of Cp and η also increases. The optimum area ratio for 120o diffuser is 4.5.
References
[1] Carlson, J.J., Johnston, J.P.,and Sagi, C.J., “Effects of Wall shape on Flow Regimes and performance in Straight, Two Dimensional Diffusers”, Journal of Basic Engineering, Trans. ASME,Vol. 89, ,pp. 151 – 160, March 1967.
[2] Fox, R.W.and Kline, S.J., September, “Flow Regimes in curved Subsonic diffusers”, Journal of basic Engineering, Trans, ASME, Vol. 84, , pp.303-316, 1962.
[3] Galle K.R. and Binder, R.C., “Two-dimensional flow Through a Diffuser With an Exit Length “, Journal of applied Mechanics , Trans. ASME, Vol. 75, pp. 390-392, 1953.
[4] Hoffmann, J. A., September,“Effects of Free-Stream Turbulence on Diffuser performance”, Journal of Fluids Engineering, Trans. ASME, VOl . 103, , pp. 385-390, 1981.
[5] Kline ,S.J,”On the Nature of Stall”, Journal of Basic Engineering , Trans. ASME, Vol. 81, ,pp.305-320., September 1959.
[6] Kline,S.J.,Abott, D.E., and fox ,R.W., “Optimum Design of Straight – Walled Diffusers”, Journal of Basic Engineering, Trans. ASME, Vol. 81, , pp. 321 – 331, September 1959.
[7] Mazumdar, B., Singh, S.N. and Agrawal, D.P.,, “Mean Flow Measurement in a Large Area ratio Curved Diffuser”,Proceedings of 19th National Conference on Fluid mechanics and Fluid power, 3-5,IIT Bombay, pp.HI-1 to HI-6, December 1992.
[8] Mazumdar , B. Mohan, R., Singh, S.N. and Agrawal , D.P.,” Experimental Study of Flow in a High Aspect Ratio 90o Curved Diffuser”, Journal of Fluids Engineering , Trans ASME, Vol. 120, , pp.83-89, March, 1998.
[9] Sagi, C.J. and Johnston, J.P., “The Design and Performance of Two-Dimensional, Curved Diffusers”, Journal of Basic Engineering , Trans. ASME, Vol. 89, ,pp. 715-731, December, 1967.
[10] Senoo, Y. and Nishi, M., “prediction of Flow Separation in a Diffuser by a Boundary Layer Calculation”, Journal of Fluidsc Engineering, Trans. ASME, Vol . 99, , pp.379-389, June 1977.
[11] Sukhatme, S.P., “A Textbook on Heat Transfer’’, Orient Longman Publication, Bombay, Third Edition,p. 258, 1989
[12] Tabhane, V., ‘’ Investigation on Subsonic S – Shaped Diffusers with Constant Width and Square Cross Section at Inlet’’, M.Tech. Project Report, Dept. of Mech. Engg., I.I.T., Bombay, 1997,.
[13] Thakur, S.N.,Vyas, B.D. and powle, U.S., December 15 -17, “Determination of Optimum Geometries for Straight Square Diffusers”, proceedings of 16th National Conference on Fluid Mechanics and Fluid power, Kanpur, India, pp. 23-27, 1988.
[14] Thakur, S.N., Powle, U.S.and Vyas,B.D.,” Flow Regimes in straight and Curved Square Diffusers”, FLUCOME’91, ASME pp. 663-668, 1991.
[15] Varshney, R., ‘’Investigation on S-Shaped Diffusers’’, M.Tech. Experimental Engineering Project Report, Dept. of Mech. Engg., I.I.T. Bombay, 2000.
[16] Waitman , B. A., Reneau, L.R. and Kline, S.J., “Effects of Inlet conditions on Performance of Two Dimensional Subsonic Diffusers”,Journal of Basic Engineering, Trans. ASME, Vol. 83, pp.349-360, September 1961.
[17] Ward-Smith, A.J., Lane, D.J., Reynolds, A.J., Sahin, b. and Shawe, D.J., “Flow Regimes in Wide Angle Screened Diffusers”, International Journal of Mechanical Sciences., Vol 33, No.1 , , pp. 41-54, 1991.
[18] Weng, P. F and Guo, R. W., ‘’New Method of Swirl Control in a Diffusing Sduct’’, AIAA Journal, Vol. 30, No. 7, pp. 1918 – 1919, 1992.
[2] Fox, R.W.and Kline, S.J., September, “Flow Regimes in curved Subsonic diffusers”, Journal of basic Engineering, Trans, ASME, Vol. 84, , pp.303-316, 1962.
[3] Galle K.R. and Binder, R.C., “Two-dimensional flow Through a Diffuser With an Exit Length “, Journal of applied Mechanics , Trans. ASME, Vol. 75, pp. 390-392, 1953.
[4] Hoffmann, J. A., September,“Effects of Free-Stream Turbulence on Diffuser performance”, Journal of Fluids Engineering, Trans. ASME, VOl . 103, , pp. 385-390, 1981.
[5] Kline ,S.J,”On the Nature of Stall”, Journal of Basic Engineering , Trans. ASME, Vol. 81, ,pp.305-320., September 1959.
[6] Kline,S.J.,Abott, D.E., and fox ,R.W., “Optimum Design of Straight – Walled Diffusers”, Journal of Basic Engineering, Trans. ASME, Vol. 81, , pp. 321 – 331, September 1959.
[7] Mazumdar, B., Singh, S.N. and Agrawal, D.P.,, “Mean Flow Measurement in a Large Area ratio Curved Diffuser”,Proceedings of 19th National Conference on Fluid mechanics and Fluid power, 3-5,IIT Bombay, pp.HI-1 to HI-6, December 1992.
[8] Mazumdar , B. Mohan, R., Singh, S.N. and Agrawal , D.P.,” Experimental Study of Flow in a High Aspect Ratio 90o Curved Diffuser”, Journal of Fluids Engineering , Trans ASME, Vol. 120, , pp.83-89, March, 1998.
[9] Sagi, C.J. and Johnston, J.P., “The Design and Performance of Two-Dimensional, Curved Diffusers”, Journal of Basic Engineering , Trans. ASME, Vol. 89, ,pp. 715-731, December, 1967.
[10] Senoo, Y. and Nishi, M., “prediction of Flow Separation in a Diffuser by a Boundary Layer Calculation”, Journal of Fluidsc Engineering, Trans. ASME, Vol . 99, , pp.379-389, June 1977.
[11] Sukhatme, S.P., “A Textbook on Heat Transfer’’, Orient Longman Publication, Bombay, Third Edition,p. 258, 1989
[12] Tabhane, V., ‘’ Investigation on Subsonic S – Shaped Diffusers with Constant Width and Square Cross Section at Inlet’’, M.Tech. Project Report, Dept. of Mech. Engg., I.I.T., Bombay, 1997,.
[13] Thakur, S.N.,Vyas, B.D. and powle, U.S., December 15 -17, “Determination of Optimum Geometries for Straight Square Diffusers”, proceedings of 16th National Conference on Fluid Mechanics and Fluid power, Kanpur, India, pp. 23-27, 1988.
[14] Thakur, S.N., Powle, U.S.and Vyas,B.D.,” Flow Regimes in straight and Curved Square Diffusers”, FLUCOME’91, ASME pp. 663-668, 1991.
[15] Varshney, R., ‘’Investigation on S-Shaped Diffusers’’, M.Tech. Experimental Engineering Project Report, Dept. of Mech. Engg., I.I.T. Bombay, 2000.
[16] Waitman , B. A., Reneau, L.R. and Kline, S.J., “Effects of Inlet conditions on Performance of Two Dimensional Subsonic Diffusers”,Journal of Basic Engineering, Trans. ASME, Vol. 83, pp.349-360, September 1961.
[17] Ward-Smith, A.J., Lane, D.J., Reynolds, A.J., Sahin, b. and Shawe, D.J., “Flow Regimes in Wide Angle Screened Diffusers”, International Journal of Mechanical Sciences., Vol 33, No.1 , , pp. 41-54, 1991.
[18] Weng, P. F and Guo, R. W., ‘’New Method of Swirl Control in a Diffusing Sduct’’, AIAA Journal, Vol. 30, No. 7, pp. 1918 – 1919, 1992.
Downloads
Published
2020-01-27
How to Cite
Agrawal, G. K., & Powle, U. S. (2020). Performance Analysis on Flow Through S Shaped Diffusers. CSVTU Research Journal, 8(2), 129–136. Retrieved from https://csvtujournal.in/index.php/rjet/article/view/76
Issue
Section
Articles
