Modes of plasma-stabilized combustion in cavity-based M = 2 configuration

Leonov, Sergey B.; Elliott, Skye; Carter, Campbell; Houpt, Alec; Lax, Philip; Ombrello, Timothy

doi:10.1016/j.expthermflusci.2021.110355

Cited by 27 publications

(2 citation statements)

References 37 publications

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“…Globally, researchers are studying the interaction between electrical discharge and a high-speed flow, in relation to two major problems: (1) plasma aerodynamics/plasma flow control [1][2][3] and (2) mixing problems [4][5][6], ignition, and flame stabilization [7,8] in a supersonic flow using discharge, known as plasma-assisted combustion [9], which is one fundamental in the development of a ramjet or a scramjet engine [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…One of the key options for a plasma actuator in a supersonic flow is a direct current discharge (or an arc discharge), which is used to control the flow [18,19] and in problems related to plasma-assisted combustion [8,20,21]. In the case of combustion, the energy input to the discharge, in recent works [21], is several percentage points of the power released during combustion.…”

Section: Introductionmentioning

confidence: 99%

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Longitudinal DC Discharge in a Supersonic Flow: Numerical Simulation and Experiment

et al. 2022

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This work focuses on detailed descriptions of DC discharge properties in supersonic airflow and its applicability in combustion simulations. Due to the complexity of obtaining most of the data in the experiment, our experimental research was supplemented by a numerical simulation. Two packages, i.e., FlowVision (fast commercial CFD for 3D engineering) and Plasmaero (2D scientific code developed in JIHT RAS for MHD tasks), were used for modeling the arc DC discharge in a supersonic flow at Mach (M) = 2. Both will be considered for further use in plasma-assisted combustion modeling, so it is important to validate both codes using experimental data from the model configuration with discharge. Axisymmetric geometries of experiments with two coaxial electrodes located parallel to the flow were chosen to avoid the appearance of the current channel part perpendicular to the flow and the corresponding discharge pulsations. Such geometries allow performing numerical simulations in 2D formulation, making it possible to compare the results obtained in the experiments and calculations. As a result of this work, two-dimensional distributions involving temperature, current density, chemical composition, and other discharge and flow parameters were obtained for arc DC discharges 0.5–7 A in a supersonic flow (Pst = 22 kPa, T = 170 K, V~500 m/s). Good qualitative agreement between experimental and numerical results was achieved. The production of a significant amount of atomic oxygen, which accelerates combustion, was noted.

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