scholarly journals AN EXPERIMENTAL ANALYSIS OF LIQUID AIR JET PUMP

2021 ◽  
Vol 17 ◽  
Author(s):  
V. W. Bhatkar ◽  
Anirban Sur
Keyword(s):  
Experimental Analysis ◽  
Jet Pump ◽  
Air Jet

Theoretical Modeling of Central Air-Jet Pump Performance for Pneumatic Transportation of Bulk Solids

1999 ◽  
Vol 121 (2) ◽  
pp. 365-372 ◽  
Author(s):  
D. Wang ◽  
P. W. Wypych
Keyword(s):  
Analytical Procedure ◽  
Area Ratio ◽  
Jet Pump ◽  
Pump Performance ◽  
Bulk Solids ◽  
Air Jet ◽  
Performance Predictions ◽  
Jet Pumps ◽  
Pneumatic Transportation ◽  
Good Agreement

A mathematical model to predict the air-solids performance of central air-jet pumps has been developed based on the fundamentals of fluid and particle mechanics. The influence of throat entry configuration on performance has been incorporated into the analytical model by introducing a throat entry function and suction area ratio. Nondimensional parameters to represent air-solids jet pump performance has been defined and used in the analytical procedure. The performance predictions obtained by this model show good agreement with experimental results.

CFD simulation and experimental analysis of flow dynamics and grinding performance of opposed fluidized bed air jet mill

2011 ◽  
Vol 98 (1-2) ◽  
pp. 94-105 ◽  
Author(s):  
M. Sri Raj Rajeswari ◽  
K.A.M. Azizli ◽  
S.F.S. Hashim ◽  
M.K. Abdullah ◽  
M. Abdul Mujeebu ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Experimental Analysis ◽  
Cfd Simulation ◽  
Flow Dynamics ◽  
Air Jet ◽  
Grinding Performance

A method of extracting smoke from buildings using a water-air jet pump

1976 ◽  
Vol 12 (4) ◽  
pp. 311-320
Author(s):  
H. P. Morgan ◽  
M. L. Bullen
Keyword(s):  
Jet Pump ◽  
Air Jet

CFD Driven Parametric Design of Air-Air Jet Pump for Automotive Carbon Canister Purging

2017 ◽  
Vol 10 (2) ◽  
pp. 474-486 ◽  
Author(s):  
Dhaval Vaishnav ◽  
Mohsen Ehteshami ◽  
Vylace Collins ◽  
Syed Ali ◽  
Alan Gregory ◽  
...  
Keyword(s):  
Parametric Design ◽  
Jet Pump ◽  
Air Jet

Experimental Analysis of Confined Jet Flames by Laser Measurement Techniques

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Oliver Lammel ◽  
Michael Stöhr ◽  
Peter Kutne ◽  
Claudiu Dem ◽  
Wolfgang Meier ◽  
...  
Keyword(s):  
Experimental Analysis ◽  
Gas Turbines ◽  
Measurement Techniques ◽  
Combustion Products ◽  
Flame Stabilization ◽  
Operating Conditions ◽  
Laser Measurement ◽  
Jet Flames ◽  
Laser Raman ◽  
Air Jet

An experimental analysis of confined premixed turbulent methane/air and hydrogen/air jet flames is presented. A generic lab scale burner for high-velocity preheated jets equipped with an optical combustion chamber was designed and set up. The size and operating conditions were configured to enable flame stabilization by recirculation of hot combustion products. The geometry of the rectangular confinement and an off-center positioning of the jet nozzle were chosen to resemble one burner nozzle of a FLOX®-based combustor. The off-center jet arrangement caused the formation of a pronounced lateral recirculation zone similar to the one in previously investigated FLOX®-combustors (Lückerath et al., 2007. “FLOX® Combustion at High Pressure with Different Fuel Compositions,” ASME J. Eng. Gas Turbines Power, 130(1), pp. 011505; Lammel et al., 2010. “FLOX® Combustion at High Power Density and High Flame Temperatures,” ASME J. Eng. Gas Turbines Power, 132(12), p. 121503ff). The analysis was accomplished by different laser measurement techniques. Flame structures were visualized by OH* chemiluminescence imaging and planar laser-induced fluorescence of the OH radical. Laser Raman scattering was used to determine concentrations of the major species and the temperature. Velocity fields were measured with particle image velocimetry. Results of measurements in two confined jet flames are shown. The mixing of fresh gas with recirculating combustion products and the stabilization of the methane flame are discussed in detail. The presented findings deliver important information for the understanding of confined jet flames operated with different fuels. The obtained data sets can be used for the validation of numerical simulations as well.

Numerical Investigation of Geometric Factors for Design of High Performance Air-Jet Pumps Using in Vehicle-Mounted Vacuum Toilet

2011 ◽  
Vol 268-270 ◽  
pp. 46-50
Author(s):  
Fei Gao ◽  
Jing Xuan Zhou ◽  
Min Li
Keyword(s):  
High Performance ◽  
Operating Conditions ◽  
Cfd Model ◽  
Jet Pump ◽  
Air Jet ◽  
Geometric Factors ◽  
Constant Area ◽  
Jet Pumps ◽  
Computational Fluid Dynamics Cfd ◽  
Area Section

Air-jet pump as the pneumatic source of a vehicle-mounted vacuum toilet provides the vacuum to pump the fecal sewage out of toilet bowl via the compressed air passing through the pump under certain pressure. In this study, Computational Fluid Dynamics (CFD) technique is employed to investigate the effects of three important air-jet pump geometry parameters: the primary Nozzle Exit Position (NXP), the constant-area section length (L1) and the diffuser diverging angle (θ), on its performance. A CFD model is firstly established according to 1D analytical method, and then used to create 135 different air-jet pump geometries and tested under different operating conditions. The significance of this study is that these findings can be used to guide the adjustment of NXP, L1 and θ to obtain the best air-jet pump performance when the operating conditions are different.

scholarly journals Numerical analysis of an annular water–air jet pump with self-induced oscillation mixing chamber

2017 ◽  
Vol 9 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Xiaogang Deng ◽  
Jingliang Dong ◽  
Zhentao Wang ◽  
Jiyuan Tu
Keyword(s):  
Transient Flow ◽  
Flow Analysis ◽  
Phase Interface ◽  
Internal Flow ◽  
Numerical Comparison ◽  
Concept Design ◽  
Jet Pump ◽  
Operational Conditions ◽  
Air Jet ◽  
Mixing Chamber

This paper presents an improved annular water–air jet pump concept design through integrating a self-induced oscillation mixing chamber with the conventional annular jet pump (AJP). The internal flow characteristics for both conventional and improved AJP were numerically investigated and compared by a validated computational fluid dynamics model. The numerical comparison demonstrated an approximately 10% pumping performance increase compared with the conventional pump, which is mostly attributed to the improved mass and energy transfer along the oscillating phase interface. Furthermore, transient flow analysis was conducted to resolve the unsteady self-introduced oscillation. The results revealed the self-introduced oscillation induces a continuous break-up and formation of fresh water–air interfaces, which exhibits a periodic feature with a dominant frequency of 147 Hz for the current design under given operational conditions. This study contributes toward a better understanding of the internal annular water–air jet pump flow patterns, and also demonstrates the feasibility of incorporating self-introduced oscillation chamber into AJP design.

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