PERFORMANCE TEST OF A SIDE-INLET, STEAM-TO-AIR JET PUMP WITH AN INBOARD NOZZLE AND A TAPERED MIXING TUBE

1954 ◽  
Author(s):  
A. M. HEINRICH
Keyword(s):  
Performance Test ◽  
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.

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

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

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.

scholarly journals THERMAL SIMULATION OF A LIQUID-AIR JET PUMP

2021 ◽  
Vol 23 (2) ◽  
pp. 225-233
Author(s):  
Vijay W. Bhatkar
Keyword(s):  
Thermal Simulation ◽  
Jet Pump ◽  
Air Jet

Can Behavioral Speech-In-Noise Tests Improve the Quality of Hearing Aid Fittings?

2011 ◽  
Vol 7 (1) ◽  
pp. 8-14
Author(s):  
Robert Moore ◽  
Susan Gordon-Hickey
Keyword(s):  
Working Memory ◽  
Speech Perception ◽  
Performance Test ◽  
Hearing Aid ◽  
Speech Perception In Noise ◽  
Speech In Noise ◽  
Acceptable Noise Level ◽  
Perceptual Performance ◽  
Noise Test

The purpose of this article is to propose 4 dimensions for consideration in hearing aid fittings and 4 tests to evaluate those dimensions. The 4 dimensions and tests are (a) working memory, evaluated by the Revised Speech Perception in Noise test (Bilger, Nuetzel, & Rabinowitz, 1984); (b) performance in noise, evaluated by the Quick Speech in Noise test (QSIN; Killion, Niquette, Gudmundsen, Revit, & Banerjee, 2004); (c) acceptance of noise, evaluated by the Acceptable Noise Level test (ANL; Nabelek, Tucker, & Letowski, 1991); and (d) performance versus perception, evaluated by the Perceptual–Performance test (PPT; Saunders & Cienkowski, 2002). The authors discuss the 4 dimensions and tests in the context of improving the quality of hearing aid fittings.

A new motor performance test in a prospective study on children with suspected myopathy

2006 ◽  
Vol 48 (09) ◽  
pp. 739 ◽  
Author(s):  
Willeke A van den Beld ◽  
Gitty AC van der Sanden ◽  
Ton Feuth ◽  
Anjo JWM Janssen ◽  
Rob CA Sengers ◽  
...  
Keyword(s):  
Prospective Study ◽  
Motor Performance ◽  
Performance Test ◽  
A Prospective Study

Contingent Negative Variation (CNV) bei Kindern mit hyperkinetischem Syndrom - eine experimentelle Untersuchung mittels des Continuous Performance Test (CPT)

2000 ◽  
Vol 28 (4) ◽  
pp. 239-246 ◽  
Author(s):  
K. Hennighausen ◽  
G. Schulte-Körne ◽  
A. Warnke ◽  
H. Remschmidt
Keyword(s):  
Contingent Negative Variation ◽  
Performance Test ◽  
Continuous Performance Test ◽  
Continuous Performance ◽  
Experimentelle Untersuchung

Zusammenfassung Fragestellung: Gibt es neurophysiologische Korrelate der Aufmerksamkeitsstörung beim hyperkinetischen Syndrom (HKS) und welche Bedeutung haben diese für die Ätiologie der Störung. Methodik: Selektive Aufmerksamkeitsprozesse wurden anhand des zweistufigen Continuous Performance Test (CPT) bei 18 Jungen mit hyperkinetischem Syndrom (HKS) untersucht und mit einer nach dem Alter parallelisierten Kontrollgruppe von 21 Jungen verglichen. Die Altersspanne der Stichprobe betrug 6 bis 12 Jahre. Parallel dazu wurden ereigniskorrelierte Potentiale (EKP) während des Tests an den Elektrodenpositionen Fz, Cz, Pz und Oz mit Referenz zu verbundenen Ohren abgeleitet. Ergebnisse: Im EKP nach dem präparatorischen Stimulus konnten zwei Komponenten der Contingent Negative Variation (CNV) mit unterschiedlicher topographischer Verteilung identifiziert werden (CNV-1: 600 bis 1100 ms und CNV-2: 1000 bis 1500 ms nach Stimulus). Die Stichproben unterschieden sich nicht auf der Verhaltensebene (Fehlerrate und Reaktionszeit). Signifikante Gruppenunterschiede ergaben sich hinsichtlich der Topographie der beiden CNV-Komponenten. Kinder mit HKS zeigten im Vergleich zu Kontrollkindern eine signifikant niedrigere CNV-1 über der frontalen und eine Tendenz zu stärkerer Negativierung (CNV-1 und CNV-2) über der occipitalen Elektrode. Schlussfolgerungen: Die Ergebnisse unterstützen die Hypothese einer Unterfunktion frontaler inhibitorischer Prozesse bei Kindern mit HKS.

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