723 Basic Study on Perfect Push-Pull Local Ventilation Systems : 1st Report: Characteristics on Induced Air Flow and the Distributions of Velocity and Turbulence Intensity of Air Jet

2006 ◽  
Vol 2006.55 (0) ◽  
pp. 309-310
Author(s):  
Koichi NAKABAYASHI ◽  
Yukihiro HATTORI ◽  
Etsuro NAITO
Keyword(s):  
Turbulence Intensity ◽  
Air Flow ◽  
Basic Study ◽  
Air Jet ◽  
Local Ventilation ◽  
Ventilation Systems

Air Flow Straighteners’ Application to Reduce the Power Consumption of Exhaust Ventilation Schemes

2018 ◽  
Vol 875 ◽  
pp. 137-140 ◽  
Author(s):  
Valery N. Azarov ◽  
Natalia M. Sergina ◽  
I.V. Stefanenko
Keyword(s):  
Power Consumption ◽  
Air Flow ◽  
Ventilation System ◽  
Aerodynamic Resistance ◽  
Experimental Studies ◽  
Swirling Flows ◽  
Dust Collector ◽  
Exhaust Ventilation ◽  
Outlet Pipe ◽  
Ventilation Systems

It was proposed to use air flow screw straightened units in outlet pipe of the dust collectors to reduce the aerodynamic resistance of exhaust ventilation systems. It is allowed to decrease power consumption for their maintenance operation consequently. The article describes the results of experimental studies to evaluate its effectiveness by applying the tangential screw straightened unit within ventilation system. The obtained results showed that the use of this device allows reducing the aerodynamic resistance of the cyclone by 14.6%, and for counter-swirling flows’ dust collector (CSFC) by 17.2-23.6%. It was found that meanings of the aerodynamic resistance depend on value the share proportion of the flow entering into lower CSFC apparatus’ input.

A Study of Air-Jet Texturing Nozzles: The Effects of Nozzle Configuration on the Air Flow

1990 ◽  
Vol 112 (1) ◽  
pp. 97-104 ◽  
Author(s):  
A. Demir
Keyword(s):  
Experimental Research ◽  
Air Flow ◽  
Main Duct ◽  
Air Jet ◽  
Nozzle Configuration

A thorough investigation of the existing texturing nozzles will, no doubt, lead to the design of improved nozzles. This paper reports the experimental research carried on the scaled-up versions of the T100 HemaJet with varying geometrical configurations, being the exit shape, situation, and inclination of the inlet holes, and the ratio of the incoming holes area to the nozzle’s main duct area. It has been found that the exit shape has virtually no effect on the airflow whilst other parameters contribute to the formation of the emerging jet which performs the texturing.

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