Volume 20, Issue 5
Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer

J. G. Zheng, J. Li, Z. J. Zhao, Y. D. Cui & B. C. Khoo

Commun. Comput. Phys., 20 (2016), pp. 1424-1442.

Published online: 2018-04

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  • Abstract

Nanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

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@Article{CiCP-20-1424, author = {}, title = {Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer}, journal = {Communications in Computational Physics}, year = {2018}, volume = {20}, number = {5}, pages = {1424--1442}, abstract = {

Nanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.090615.140316a}, url = {http://global-sci.org/intro/article_detail/cicp/11196.html} }
TY - JOUR T1 - Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer JO - Communications in Computational Physics VL - 5 SP - 1424 EP - 1442 PY - 2018 DA - 2018/04 SN - 20 DO - http://doi.org/10.4208/cicp.090615.140316a UR - https://global-sci.org/intro/article_detail/cicp/11196.html KW - AB -

Nanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

J. G. Zheng, J. Li, Z. J. Zhao, Y. D. Cui & B. C. Khoo. (2020). Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer. Communications in Computational Physics. 20 (5). 1424-1442. doi:10.4208/cicp.090615.140316a
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