Investigation of Laser Heating In Components with Sharp Edges.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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Numerical results are presented for the approximate time-averaged power density dissipated on the surface of a highly conductive infinite wedge of angle 90 deg near the vicinity of the sharp edge. The numerical results are normalized so one may readily obtain results for varying incident wave frequencies. The angle of incidence of the incident radiation, Theta sub i measured with respect to the surface normal of the wedge, is varied from 0 deg normal incidence to 90 deg grazing incidence. In particular, numerical results for TE and TM polarization are presented for incident wavelengths of 3.8 and 10.6 micrometers. It is assumed that the power density absorbed wattssq m. is all converted to heat density. To accept the validity of the results, an extensive check is made on an arbitrary real order Bessel function subroutine used in the equation necessary for the numerical calculations. General electromagnetic theory is also discussed and extended to the use in specific geometries. The geometries considered besides the wedge though with no numerical results are the parabolic cylinder and infinite cone. In conclusion, the numerical results seem very promising due to the success of verifying the Bessel function subroutine used in the calculations. Author
- Lasers and Masers