Numerical Study of Plasma-Assisted Aerodynamic Control for Hypersonic Vehicles

Nicholas Bisek, Iain Boyd, Jonathan Poggie
2008 39th Plasmadynamics and Lasers Conference   unpublished
Plasma actuators and various forms of volumetric energy deposition have received a good deal of research attention recently as a means of hypersonic flight control. An open question remains as to whether the required power expenditures for such devices can be achieved for practical systems. To address this issue, a numerical study is carried out for hypersonic flow over a blunt-nose elliptic cone to determine the amount of energy deposition necessary for flight control. Energy deposition is
more » ... y deposition is simulated by means of a phenomenological dissipative heating model. A parametric study of the effects of energy deposition is carried out for several blunt elliptic cone configurations. Three different volumetric energy deposition patterns are considered: a spherical pattern, a "pancake" pattern (oblate spheroid), and a "bean" pattern (prolate spheroid). The effectiveness of volumetric energy deposition for flight control appears to scale strongly with a nondimensional parameter based on the freestream flow kinetic energy flux. Nomenclature A = surface area of grid cell a, b, c = the equatorial radii and the polar radius of an ellipsoid = total energy per volume h = enthalpy i, j, k = computational grid indices along the axial, radial, and circumferential directions J = mass diffusion flux, x, y, z directions L = axial surface length M p = moment about center of gravity n = normal vector p = pressure Q = total power input by actuator q = heat flux, translational-rotational and vibrationalelectronic Q = nondimensional total power input by actuator, Q= 1 u 3 1 L 2 Re x = running Reynolds number, 1 u 1 x= 1 S = source term St = Stanton number, q w = 1 u 1 h 0 h w T = temperature, translational and rotational T v = temperature, vibrational and electronic u = velocity vector u; v; w x, y, z = streamwise, spanwise, and transverse coordinates = emissivity = angle along circumference of the body, cylindrical coordinate system = characteristic length = coefficient of viscosity = mass density = Stefan-Boltzmann constant, 5:67 10 8 W=m 2 K 4 = viscous stress = inclination of the deposition to the freestream flow Subscripts s = species w = wall 0 = stagnation 1 = freestream
doi:10.2514/6.2008-4226 fatcat:ulkyv6hqczbb7kzonleyrt7sgu