The effect of melt removal by aerodynamic shear on meltthrough of metal plates
Abstract
Theoretical models are constructed for meltthrough of metal plates under intense onedimensional heating and tangential airflow. The limiting cases of complete melt retention and complete melt removal are modeled by energy balances at the instant of meltthrough, using the heatbalance integral method. The resulting semianalytical formulas agree well with computer solutions of onedimensional, nonsteady heat conduction for melting and vaporizing metal plates. For partial melt removal, the effect of shear in removing melt is modeled by a liquid pool of finite depth with a shear suddenly applied at the top surface. This is incorporated in a dynamical calculation of the melting and vaporizing of the plate, using the heatbalance integral method, and requiring solution of ordinary differential equations in time. Calculations show the transition from complete melt removal to complete melt retention when the heating rate is increased at fixed airflow.
 Publication:

AIAA, 12th Thermophysics Conference
 Pub Date:
 June 1977
 Bibcode:
 1977thph.confR....K
 Keywords:

 Aerodynamic Forces;
 Laser Heating;
 Melting;
 Metal Plates;
 Shear Stress;
 Vaporizing;
 Conductive Heat Transfer;
 Differential Equations;
 Heat Balance;
 Fluid Mechanics and Heat Transfer