Mixing layer effects on the entrainment ratio in steam ejectors through ideal gas computational simulations. Three-dimensional CFD modelling and simulation on the performance of steam ejector heat pump for dryer section of the paper machine. Investigation on the effects of water steam ejector geometry in the refrigeration systems using entropy generation assessment. Numerical investigation of the influences of mixing chamber geometries on steam ejector performance. Experimental and computational studies on a steam jet refrigeration system with constant area and variable area ejectors. A new prescription for the design of supersonic jet-pumps: the constant rate of momentum change method. Huang BJ, Chang JM, Wang CP, Petrenko VA. Design of steam ejector in a refrigeration application based on thermodynamic performance analysis. A new ejector theory applied to steam jet refrigeration. From the parametric study, it is concluded that L m and D m of 1 m and 0.13 m, respectively, gave a better flow uniformity, non-fluctuated flow and maximum ω. Any further increase in D m caused a decrease in ω. D m has shown a significant effect on ω, and it increased from 1.12 to 1.64 when D m was varied from 0.1 to 0.13 m. A minimum L m of 1 m was required to get a uniform, non-fluctuated and symmetric profile of Mach number, temperature, pressure and density inside the system, especially at the diffuser section. ![]() It was found that L m has shown less influence on ω and r p. Mach number, temperature, pressure and density profiles inside the steam ejector were estimated and analyzed. L m was varied from 0.6 to 1.2 m and D m from 0.1 to 0.14 m. Realizable k– ε turbulence model was chosen for considering the turbulence effects. A 3D turbulent model was developed to investigate these geometry parameters. ![]() The work aims to perform a parametric study and propose the optimized geometry parameters of a steam ejector, such as mixing chamber length ( L m) and diameter ( D m), for getting maximum ω and r p. The performance of an ejector is a function of entrainment ratio ( ω) and pressure lift ratio ( r p). It is used to pump or compress a low-pressure fluid with the help of a high-pressure fluid without any moving parts. Ejector is a simple device which is used in gas turbine and steam power plants.
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