Numerical Study of Flow Inside an Annular Jet Pump

2006 ◽  
Vol 20 (4) ◽  
pp. 930-932 ◽  
Author(s):  
M. El Gazzar ◽  
Tarek Meakhail ◽  
Samy Mikhail
Keyword(s):  
Numerical Study ◽  
Jet Pump ◽  
Annular Jet ◽  
Annular Jet Pump

scholarly journals Numerical Study on the Working Performance of a Streamlined Annular Jet Pump

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4411
Author(s):  
Xiaodong Wang ◽  
Yunliang Chen ◽  
Mengqiu Li ◽  
Yong Xu ◽  
Bo Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
High Efficiency ◽  
Numerical Study ◽  
Flow Ratio ◽  
Jet Pump ◽  
Local Pressure ◽  
Maximum Increase ◽  
Annular Jet ◽  
Working Performance ◽  
Annular Jet Pump

To improve the working performance of the early annular jet pump (EAJP), a streamlined annular jet pump (SAJP) was proposed. The flow field and working performance of the EAJP and SAJP with an area ratio (m) of 1.75 were numerically studied and compared, separately, by using the combination of the Realizable k-ε turbulence model and the Schnerr–Sauer cavitation model. The results show that the efficiency of the SAJP is higher than that of the EAJP, when the flow ratio (q) is higher than 0.30, with a maximum increase of 1.2%. Furthermore, the high-efficiency area of the SAJP (q = 0.40~0.69) is wider than that of the EAJP (q = 0.36~0.57). There is no flow separation and low local pressure in the SAJP, due to the conjunction part of the suction chamber, throat, diffuser and outlet pipe without the structural mutation. It was found that the incipient cavitation number (σi) of the SAJP and EAJP was 0.541 and 0.578, respectively; therefore, the cavitation performance of the SAJP is better. Meanwhile, the critical flow ratio (qc) of the SAJP is 0.69, which is larger than that of the EAJP (qc = 0.57), implying that the SAJP has a wider normal working range than the EAJP. Importantly, the inception and development of cavitation appeared in the diffuser of the SAJP, different from that in the throat of the EAJP. Hence, it concluded that the cavitation in the SAJP has less influence on the flow field and working performance.

Annular Jet Pump

1959 ◽  
Vol 30 (4) ◽  
pp. 296-297 ◽  
Author(s):  
Werner H. Haak ◽  
Frederick Vrátný
Keyword(s):  
Jet Pump ◽  
Annular Jet ◽  
Annular Jet Pump

Two-dimensional numerical simulations on the performance of an annular jet pump

2002 ◽  
Vol 5 (1) ◽  
pp. 21-28 ◽  
Author(s):  
O. B. Kwon ◽  
M. K. Kim ◽  
H. C. Kwon ◽  
D. S. Bae
Keyword(s):  
Numerical Simulations ◽  
Two Dimensional ◽  
Jet Pump ◽  
Annular Jet ◽  
Annular Jet Pump

scholarly journals Parameter Analysis and Optimization of Annular Jet Pump Based on Kriging Model

2020 ◽  
Vol 10 (21) ◽  
pp. 7860
Author(s):  
Kai Xu ◽  
Gang Wang ◽  
Liquan Wang ◽  
Feihong Yun ◽  
Wenhao Sun ◽  
...  
Keyword(s):  
Global Optimization ◽  
Kriging Model ◽  
Optimization Method ◽  
Area Ratio ◽  
Pump Efficiency ◽  
Jet Pump ◽  
Pump Design ◽  
Annular Jet ◽  
Design Variables ◽  
Annular Jet Pump

Jet pump efficiency heavily relies on the geometrical parameters of the pump design and parameter global optimization in the full variable space is still a big challenge. This paper proposed a global optimization method for annular jet pump design combining computational fluid dynamics (CFD) simulation, the Kriging approximate model and experimental data. The suction angle, the flow ratio, the diffusion angle, and the area ratio are selected as the design variables for optimization. The optimal space filling design (OSF) method is used to generate sampling points from the design space of the four design variables. The optimization method solves the constrained optimization problem with a given head ratio by building the functional relationship established by the Kriging model between efficiency and design parameters, which makes the method more applicable. The design result shows that the annular jet pump efficiency is predicted well by the Kriging model; m is a key variable affecting the annular jet pump efficiency. As the area ratio m decreases, the mixing effect at the suction chamber outlet can be improved, but the frictional resistance increases.

Sign in / Sign up

Export Citation Format

Share Document