TAILIEUCHUNG - Research on numerical simulation for velocity distribution of swirling turbulent jets in spray irrigation technology
In spray irrigation technology, the change of the basic parameters of the flowfield has relationship directly with the coefficient of swirling intensity coefficient S, with each value of swirling coefficient differently then the distribution of parameters in flow field also variedly. Remarkably change when the coefficient of swirl intensity changes through the variables as axial velocity u, tangential velocity w; the change of radial velocity v related to turbulent intensity. | TẠP CHÍ PHÁT TRIỂN KH&CN, TẬP 13, SỐ K3 - 2010 RESEARCH ON NUMERICAL SIMULATION FOR VELOCITY DISTRIBUTION OF SWIRLING TURBULENT JETS IN SPRAY IRRIGATION TECHNOLOGY Vo Tuyen(1),Nguyen Thanh Nam(2) (1) Ho Chi Minh City Food Processing College (2) DCSELAB, University of Technology, VNU-HCM ABSTRACT: In spray irrigation technology, the change of the basic parameters of the flowfield has relationship directly with the coefficient of swirling intensity coefficient S, with each value of swirling coefficient differently then the distribution of parameters in flow field also variedly. Remarkably change when the coefficient of swirl intensity changes through the variables as axial velocity u, tangential velocity w; the change of radial velocity v related to turbulent intensity. Keywords: Numerical simulation, swirling turbulent jets, irrigation technology Swirling turbulent flows result from the 1 INTRODUCTION The dramatic effects of swirling turbulent flows in inert and reacting flow systems have been known and appreciated for many years. In fact, swirling turbulent flows occur in a very wide range of applications in both with and without combustion. In non-reacting cases, application of a spiraling motion, a swirl velocity component (tangential velocity component) being imparted to the flow by the use of swirl vanes, by the use of axial-plustangential entry swirl generators or by direct tangential entry into the chamber [1]. applications include, for example, vortex Therefore, studying the impact of swirling amplifiers and reactors, cyclone separators, effect to the velocity distribution of swirling Ranque-Hilsch tubes, whirlpools, agricultural turbulent spray jets is necessary to establish spraying completely for mathematical and numerical machines, heat exchangers, jet pumps In combustion systems, the strong models of the spray jets. favorable effects of applying swirl to injected 2 SET UP A MATHEMATICAL MODEL air and fuel are extensively used as
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