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Experimental study of flow control over an Ahmed body using plasma actuator

Shadmani S., Mousavi Nainiyan S. M, Ghasemiasl R., Mirzaei M., Pouryoussefi S. G.

Mechanics and Mechanical Engineering

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2018

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Vol. 22, nr 1

239--251

EN

Ahmed Body is a standard and simplified shape of a road vehicle that’s rear part has an important role in flow structure and it’s drag force. In this paper flow control around the Ahmed body with the rear slant angle of 25° studied by using the plasma actuator system situated in middle of the rear slant surface. Experiments conducted in a wind tunnel in two free stream velocities of U = 10 m/s and U = 20 m/s using steady and unsteady excitations. Pressure distribution and total drag force was measured and smoke flow visualization carried out in this study. The results showed that at U = 10 m/s using plasma actuator suppress the separated flow over the rear slant slightly and be effective on pressure distribution. Also total drag force reduces in steady and unsteady excitations for 3.65% and 2.44%, respectively. At U = 20 m/s, using plasma actuator had no serious effect on the pressure distribution and total drag force.

2

Experimental study of flow control over a standard road vehicle using plasma actuator

Shadmani S., Mousavi Nainiyan S. M., Ghasemiasl R., Mirzaei M., Pouryoussefi S. G.

Mechanics and Mechanical Engineering

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2018

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Vol. 22, nr 4

1047--1059

EN

Ahmed Body is a standard and simplified shape of a road vehicle that's rear part has an important role in flow structure and it's drag force. In this paper flow control around the Ahmed body with the rear slant angle of 25˚ studied by using the plasma actuator system situated in middle of the rear slant surface. Experiments conducted in a wind tunnel in two free stream velocities of U = 10m/s and U = 20m/s using steady and unsteady excitations. Pressure distribution and total drag force were measured and smoke flow visualization carried out in this study. The results showed that at U = 10m/s using plasma actuator suppress the separated flow over the rear slant slightly and be effective on pressure distribution. Also, total drag force reduces in steady and unsteady excitations for 3.65% and 2.44%, respectively. At U = 20m/s, using plasma actuator had no serious effect on the pressure distribution and total drag force.

3

Optical emission spectroscopy investigation of the low-power multispark plasma actuator

Olszewski S., Bondarenko P., Kostenko S., Komada P.

Elektronika : konstrukcje, technologie, zastosowania

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2013

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Vol. 54, nr 8

54-57

PL

Jedną z istotnych metod kontrolowania przepływu aerodynamicznego przy powierzchni jest oddziaływanie na przepływ pulsującej plazmy. Dla rzeczywistych urządzeń wyładowczych, stosowanych w tego rodzaju zagadnieniach bardzo ważne jest zrozumienie jakie tryby zachowania plazmy z ciśnieniem atmosferycznym dają maksymalny efekt przy minimalnym zużyciu energii. Praktyczny aspekt pracy stanowią wyniki postępów w pracach nad skalowalnym wysokonapięciowym źródłem zasilania do wytwarzania wieloiskrowych wyładowań o dużej długości całkowitej. Podstawowy aspekt pracy stanowią rezultaty badań właściwości emisji plazmy dla quasi-stacjonarnych wioeloiskrowych wyładowań w ciśnieniu atmosferycznym.

EN

One of the important ways of controlling aerodynamic flow near the surface there is an impact to the flow of pulsating plasma. For a real discharge devices used in such problems it is very important to understand what modes maintain plasma of atmospheric pressure give maximum effect with minimum energy consumption. In the applied aspect of this work presents the results of the development of a scalable high-voltage power source to generate a multi-spark discharge with large total length. A fundamental aspect of this work presents the results of research of the plasma emission properties of quasi-stationary multi-spark discharge in atmospheric pressure.