Synthetic and Continuous Jets Impinging on a Circular Cylinder

Abstract

Declaration of authorshipI hereby confirm that the submitted work is entirely my own and was written only with help of referenced literature. iv AbstractSynthetic and continuous jets impinging onto an heated circular cylinder were investigated.The study was performed experimentally. For this reason, a piezoelectrically driven actuator with water as the working fluid was designed. The basic parameters of the experiments were: the slot nozzle width was 0.36 mm, the aspect ratio of the slot was 111, the cylinder diameter was 1.2 mm, and the cylinder-to-nozzle spacing related to the slot width was 5-21.

Control of a Round Jet Intermittency and Transition to Turbulence by Means of an Annular Synthetic Jet

“…Since the end of the last century [23], the phenomenon has been investigated in terms of problems of modeling and performance [30][31][32][33][34][35], as well as design and optimization [36][37][38][39][40]. A primary reason for such interest is the potential of SJ for various applications, such as active flow control [27,[41][42][43][44][45][46][47][48], convective heat transfer [49][50][51][52][53][54][55][56][57][58][59][60], mixing enhancement, and thrusters for underwater vehicles [26]. Note that the convective heat transfer applications in impinging jet arrangement [49][50][51][52][53][54][55][56][57][58][59][60] are considered as a potentially very promising area for the investigated subject.…”

“…A primary reason for such interest is the potential of SJ for various applications, such as active flow control [27,[41][42][43][44][45][46][47][48], convective heat transfer [49][50][51][52][53][54][55][56][57][58][59][60], mixing enhancement, and thrusters for underwater vehicles [26]. Note that the convective heat transfer applications in impinging jet arrangement [49][50][51][52][53][54][55][56][57][58][59][60] are considered as a potentially very promising area for the investigated subject. However, the jet impingement effects are beyond the main scope of this study.…”