vol20no2pa8

References

[1] Batchelor, Introduction to Fluid Dynamics, Cambridge University Press, New York.

[2] Versteeg, H. K., Malalasekera W., “An Introduction to Computational Fluid Dynamics – The Finite Volume Method”, Longman Group Ltd, 1995

[3]  Kubota A., Kato H., Yamaguchi H.: A New Modeling of Cavitating Flows: A Numerical Study of Unsteady Cavitation on a Hydrofoil Section. J. Fluid Mech. 1992

[4] Senocak I., Shyy W.: Evaluation of cavitation models for Navier-Stokes computations, Proceeding of FEDSM 02, ASME fluid engineering division summer meeting, Montreal, Canada, 2002

[5] Lee, Kinnas and Fine, 1993), and Euler/Navier‐Stokes equation‐based models (Chen and Heister, 1994; Deshpande et al., 1997.

[6] Delannoy and J. L. Kueny, “Cavity flow predictions based on the Euler equations,” in Proceedings of the ASME Cavitation and Multi-Phase Flow Forum, vol. 109, pp. 153–158, Portland, Ore, USA, June 1990.

Tikrit Journal of Engineering Sciences (2013) 20(2) 81-93

Experimental and Simulation of Dual phase Flow In Venture Convergence-Divergence Nozzle

Fayadh M. Abed Al-Dulaimy Maki Hag Zedan Ghazi-Yousif-Mohammed Seenaa Khudhayer Salman
Mechanical Eng. Dept., Tikrit University, Iraq

Abstract

In steam power plants, and high pressure high temperature water flow, phase change takes place resulting in bubbly flow. Such flow causes vibration and noise in the conduits. The present study emphasized on cavitations during a dual phase flow (water- vapor) with a variation of velocities at different conditions in converge-divergence nozzle. The investigation was carried out experimentally and numerically, by CFD simulation. A transparent material is used of PMMA in order to visualize the various regions of the flow. Furthermore, the effect of flow velocities on vibration and noise was evolved in the experimental measurements. The CFD simulation model of this problem is defining a dual compressible viscous flow with k-epsilon model for the turbulence modeling. The analyses of the simulation results and the experimental observation have been seen to be comparatively conscionable in the cavitation zone and the estimation of the throat pressure cavitations during a dual phase flow with a variation of mass transfer conditions. A model were combined with a linear viscous turbulent model for the mixed fluids in the computational fluid dynamics software. A CFD Code with modified user intervention is used to simulate steady cavitation. Some of the models were also tested using a three dimensional -CFD code in configurations of cavitation on three-dimensional a converge-diverge sections. The pressure distributions and volume fractions of vapor at different cavitation numbers were simulated, which agreed well with experimental data.

Download Full-text PDF

KeywordsCavitation’s, Evaporation, Condensation, and Convergence–divergence Nozzle, Bubbly Flow.

How to cite

TJES: Al-Dulaimy FMA, Zedan MH, Mohammed GY, Salman SK. Experimental and Simulation of Dual phase Flow In Venture Convergence-Divergence NozzleTikrit Journal of Engineering Sciences 2013; 20(2): 81-93.
APA: Al-Dulaimy, F. M. A., Zedan M. H., Mohammed G. Y., & Salman, S. K. (2013). Experimental and Simulation of Dual phase Flow In Venture Convergence-Divergence Nozzle. Tikrit Journal of Engineering Sciences, 20(2), 81-93.