The evolution of co-rotating streamwise vortices in a canonical flat plate turbulent boundary layer ~thickness of the boundary layer d0.99525 mm) is studied. The vortices are produced by an array of inclined jets ~diameter D514 mm) with the same orientation ~skew angle b and pitch angle a of 45°!. The focus of the investigation is on the immediate vicinity of the jet exit and downstream locatio...

In this paper some discrete parts of an electrostatic and flat-walled self-aligned valveless, micropump for drug delivery system is designed and simulated. The core component of the system is a piezoelectric diaphragm that can convert the reciprocating movement of a diaphragm actuated by a piezoelectric actuator into a pumping effect. The deflection in the diaphragm was analyzed by applying the...

Primary nozzle is one of the most important factors which has a large influence on performance thermo-compressors. Most studies carried out until now, have been performed single-nozzle In this paper, an actual industrial thermo-compressor considered and purpose to study effect increasing primary number thermo-compressor. For purpose, triple-nozzle simulated numerically its compared with Ideal g...

To improve the jetting performance of liquid metals, an electromagnetic micro-jetting (EMJ) valve that realizes drop-on-demand (DOD) jetting while not involving any valve core or moving parts was designed. The influence of the lead angle of the nozzle on the jetting of liquid metal gallium (Ga) was investigated. It was found that the Lorentz force component parallel to the nozzle that jets the ...

iii Nomenclature h altitude, ft ˙ h vertical velocity, ft/sec K fnt scale factor for lift from jet-induced fountain p roll rate, deg/sec q pitch rate, deg/sec r yaw rate, deg/sec T CN cruise nozzle thrust, lb T LF lift-fan thrust, lb T LN lift-nozzle thrust, lb T R rise time, sec V airspeed, knots V ej equivalent jet velocity ratio V x ground speed, ft/sec V y lateral velocity, ft/sec β sidesli...

A rise in the fat concentration of human milk within the syringe was noted towards the end of continuous infusion but not with intermittent bolus gastric feeding. The rise in the former was reduced most simply and effectively by using an eccentric nozzle syringe and tilting the pump up at an angle of between 25 degrees and 40 degrees.

The purpose of this paper is to analyze the flow field structure in transient state and performance of secondary injection system for thrust vectoring in divergent section of a two-dimensional nozzle. Secondary injection for thrust vectoring in a two-dimensional nozzle is studied by solving three-dimensional Reynolds-averaged equations by means of fluent solver. Spalart-allmaras model was used ...

Performance and emission characteristics of compression ignition engines depend strongly on inner nozzle flow and spray behavior. These processes control the fuel air mixing, which in turn is critical for the combustion process. The differences in the physical properties of petrodiesel and biodiesel are expected to significantly alter the inner nozzle flow and spray structure and, thus, the per...