Coupling between fluid dynamics and energy addition in arcjet and microwave thrusters
Abstract
A new approach to numerically solving the problem of the constricted electric arcjet is presented. An Euler Implicit finite difference scheme is used to solve the full compressible Navier Stokes equations in two dimensions. The boundary and initial conditions represent the constrictor section of the arcjet, and hydrogen is used as a propellant. The arc is modeled as a Gaussian distribution across the centerline of the constrictor. Temperature, pressure and velocity profiles for steady state converged solutions show both axial and radial changes in distributions resulting from their interaction with the arc energy source for specific input conditions. The temperature rise is largest at the centerline where there is a the greatest concentration arc energy. The solution does not converge for all initial inputs and the limitations in the range of obtainable solutions are discussed.
 Publication:

Pennsylvania State Univ. Report
 Pub Date:
 April 1986
 Bibcode:
 1986psu..reptR....M
 Keywords:

 Arc Jet Engines;
 Compressible Flow;
 Electric Arcs;
 EulerCauchy Equations;
 Finite Difference Theory;
 NavierStokes Equation;
 Numerical Analysis;
 Two Dimensional Flow;
 Convergence;
 Pressure Gradients;
 Temperature Profiles;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer