Numerical Modeling of Cavitation in Jet Fuel

Bourassa, Corey; Parsons, Abigail

doi:10.2514/6.2007-339

Cited by 2 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unsteady cavitating flow inside the oil jet pump with multiple noz zles is controlled by the Reynolds-averaging Navier-Stokes equa tions together with the standard wall functions and the mixture model [20], The simulation time step is set to 0.0001 s. The cavitation model developed by Singhal et al [21] was adopted to consider the effects of dissolved air, water, and particles in lubri cation oil [10].…”

Section: Models Of Numerical Simulationmentioning

confidence: 99%

“…Lu et al [8] and Zou et al [9] proposed a quali tative relation for predicting the incipience and intensity of cavitation based on the dramatic increase in acoustic energy spectra at the onset of cavitation inception. Bourassa and Parsons [10] and Davis et al [11] investigated the cavitating flow of jet fuel in a convergingdiverging nozzle with numerical simulation and experiment, respectively. They found that the dissolved air, water, and par ticles in jet fuel have significant influence on cavitating flow.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on the Cavitation Characteristics of an Oil Jet Pump With Multiple Nozzles for the Lubrication System in a Steam Turbine

Zhang

Mao

Wang

et al. 2014

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

Cavitation characteristics o f oil je t pumps with multiple nozzles were studied using high frequency response pressure transducers with Mobile DTE Light Oil in experiment, which has an environment the same as that in the lubrication system o f the steam turbine in a power plant. The influence o f working oil pressure, pressure ratio, and area ratio on cavitation characteristics were studied with the area ratio ranging from 4 to 9, and the working oil pressure ranging from 1. 8 to 2.8 MPa. Results show that the cavitation erosion on the throat surface is caused by the intense shear layer o f high-speed je t in the throat, which leads to the collapse o f vortex cavitation bubbles near the throat surface in an oil je t pump with multiple nozzles. What is more, the vortex cavitation is difficult to eradicate in an oil je t pump with multiple nozzles fo r the lubrication system o f a steam turbine.However, there is a working point with low cavitation intensity, which is also the high efficiency point that ensures both relative safety and high efficiency. This study provides quantitative relation fo r the determination o f working oil pressure, area ratio, and pres sure ratio o f an oil je t pump with multiple nozzles, which is significant fo r engineering.

show abstract

Section: Models Of Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Cavitation Characteristics of an Oil Jet Pump With Multiple Nozzles for the Lubrication System in a Steam Turbine

Zhang

Mao

Wang

et al. 2014

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

show abstract

“…The full cavitation model developed by Singhal et al 14 combined with the mixture model 6,12,15 was used to simulate cavitating flow in multiple nozzle oil jet pump. According to the study of Long et al, 4 cavitation bubbles in jet pump are very small and emerge at high velocity region.…”

Section: Cavitation Modelmentioning

confidence: 99%

“…It is shown that the cavitation bubbles of jet fuel persisted throughout the diffuser, while a bubbly shock was observed for water. Bourassa and Parsons 12 proposed the dissolved air, water, and particles in jet fuel have significant influence on the cavitating flow in converging-diverging nozzles. Holl et al 13 found a qualitative relationship between the desinent-cavitation number and the concentration of dissolved gas, which shows that cavitation is promoted by dissolved gas.…”

Section: Introductionmentioning

confidence: 99%

Influence of noncondensible gas on flowing characteristics of multiple nozzle oil jet pump for lubrication system in steam turbine

Zhang

Mao

Wang

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

The full cavitation model introduced by Singhal et al. was partly improved based on experimental results. The improved cavitation model is used to simulate cavitating flow in multiple nozzle oil jet pump for lubrication system in steam turbine. The influence of noncondensible gas on flowing characteristics of multiple nozzle oil jet pump was studied with noncondensible gas content in the range of 0.01–500 ppm. Results show that noncondensible gas has little influence on nonchoking flow while imminent choking flow and deep choking flow are greatly affected. With the increase of noncondensible gas, multiple nozzle oil jet pump enters choking flow earlier. The maximum suction flow rate per unit throat area of multiple nozzle oil jet pump remains constant with varying pressure ratios and area ratios under choking flow, which is only determined by the noncondensible gas content. It is suggested that the maximum suction flow rate per unit throat area is used for the prediction of choking flow in multiple nozzle oil jet pump. This study also provides qualitative criteria for the upper limit of water content in lubrication oil, which avoids multiple nozzle oil jet pump working under choking flow.

show abstract

Numerical Modeling of Cavitation in Jet Fuel

Cited by 2 publications

References 4 publications

Experimental Study on the Cavitation Characteristics of an Oil Jet Pump With Multiple Nozzles for the Lubrication System in a Steam Turbine

Experimental Study on the Cavitation Characteristics of an Oil Jet Pump With Multiple Nozzles for the Lubrication System in a Steam Turbine

Influence of noncondensible gas on flowing characteristics of multiple nozzle oil jet pump for lubrication system in steam turbine

Contact Info

Product

Resources

About