Performance Characteristics of the SparkJet Flow Control Actuator

2004 ◽  
Author(s):  
Bohdan Cybyk ◽  
Kenneth Grossman ◽  
Jordan Wilkerson
Keyword(s):  
Flow Control ◽  
Performance Characteristics

Minimization of Power Consumption in Fluidic flow Control Circuits

1973 ◽  
Vol 15 (6) ◽  
pp. 392-399 ◽  
Author(s):  
J. R. Tippetts
Keyword(s):  
Power Consumption ◽  
Flow Control ◽  
Circuit Design ◽  
Performance Characteristics ◽  
Fluidic Devices ◽  
Control Circuits ◽  
Flow States

Three fluidic flow control circuits are analysed so that their controlling ability and power consumption can be determined. Under certain conditions the power consumption can be minimized by judicious circuit design and it is shown that optimization depends on certain well-defined non-dimensional performance characteristics of the fluidic devices. The circuits involve unvented vortex amplifiers and bistable wall-attachment amplifiers, which are considered to operate in a few simply defined flow states. The object of this paper is to show how such calculations can be made and to show quantitatively the potentialities and limitations of currently available devices.

scholarly journals Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air-Intake

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Akshoy Ranjan Paul ◽  
Shrey Joshi ◽  
Aman Jindal ◽  
Shivam P. Maurya ◽  
Anuj Jain
Keyword(s):  
Flow Control ◽  
Pitch Angle ◽  
Pressure Loss ◽  
Total Pressure ◽  
Static Pressure ◽  
Vortex Generator ◽  
Performance Characteristics ◽  
Total Pressure Loss ◽  
Air Intake ◽  
Side Walls

The flow control in twin air-intakes is necessary to improve the performance characteristics, since the flow traveling through curved and diffused paths becomes complex, especially after merging. The paper presents a comparison between two well-known techniques of flow control: active and passive. It presents an effective design of a vortex generator jet (VGJ) and a vane-type passive vortex generator (VG) and uses them in twin air-intake duct in different combinations to establish their effectiveness in improving the performance characteristics. The VGJ is designed to insert flow from side wall at pitch angle of 90 degrees and 45 degrees. Corotating (parallel) and counterrotating (V-shape) are the configuration of vane type VG. It is observed that VGJ has the potential to change the flow pattern drastically as compared to vane-type VG. While the VGJ is directed perpendicular to the side walls of the air-intake at a pitch angle of 90 degree, static pressure recovery is increased by 7.8% and total pressure loss is reduced by 40.7%, which is the best among all other cases tested for VGJ. For bigger-sized VG attached to the side walls of the air-intake, static pressure recovery is increased by 5.3%, but total pressure loss is reduced by only 4.5% as compared to all other cases of VG.

The characteristics of rotary feeders used for the flow control of particulate materials

2000 ◽  
Vol 214 (1) ◽  
pp. 43-52 ◽  
Author(s):  
A R Reed ◽  
M S A Bradley ◽  
A N Pittman
Keyword(s):  
Flow Control ◽  
Experimental Work ◽  
Feed Rate ◽  
Performance Characteristics ◽  
Particle Sizes ◽  
Rotor Speed ◽  
Solid Materials ◽  
Model Studies ◽  
Flow Through ◽  
Granular Solid

Rotary feeders are one of the most widely used devices for regulating the flow of powdered and granular solid materials from storage facilities such as hoppers, silos, bins and bunkers. In this paper the performance characteristics of such feeders are examined, from both model and experimental standpoints, with a view to enhancing understanding of the operation of these devices. Through understanding the way in which materials flow through the inlet port and into the rotor pockets a model is developed that describes how the feed rate varies with the rotor speed. Experimental work confirms the general form of the characteristics predicted by the model studies. An approach is developed for predicting the feed rate characteristics when handling free-flowing materials having particle sizes greater than 5 mm. Further work is necessary to predict these characteristics when handling materials have particles smaller than this size.

Flow Control in Wide-Angled Conical Diffusers

1976 ◽  
Vol 98 (4) ◽  
pp. 728-735 ◽  
Author(s):  
M. C. Welsh
Keyword(s):  
Flow Control ◽  
Control Device ◽  
Performance Characteristics ◽  
Flow Conditions ◽  
Mean Velocity ◽  
Inlet Condition ◽  
Control Techniques ◽  
Flow Control Device ◽  
Conical Diffuser ◽  
Two Factors

Flow control techniques in wide-angled conical diffusers are discussed. Selected performance characteristics of a wide-angled conical diffuser and tailpipe with and without a star flow-control device are also presented. The diffuser performance is sensitive to the star location and geometry and to the diffuser inlet flow conditions. The correct combination of the first two factors for a given inlet condition leads to a significant increase in pressure recovery and flow stability in the diffuser and tailpipe, together with satisfactory mean velocity profiles for entry to downstream duct components.

scholarly journals Study of unsteady operating conditions of a three-port spool flow control valve

2017 ◽  
pp. 88-93
Author(s):  
B. A. Khramov ◽  
A. V. Gusev
Keyword(s):  
Flow Control ◽  
Dynamic Models ◽  
Control Valve ◽  
Operating Conditions ◽  
Performance Characteristics ◽  
Flow Control Valve ◽  
Static Performance

The paper focuses on static and dynamic models of operation of a three-port spool flow control valve. The study takes into account dynamics of moving elements and tests of an improved three-port spool flow control valve. The static performance characteristics and spool geometry selection guidelines are provided. Finally, the areas of further research are specified.

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