Laser Window for High Pressure Steam Application

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The world we live in is at ambient temperature. We have things to deal with it if temperature gets out of control. Heaters or air conditioners, depending on the season. The world of engineering is not like that. Temperatures in the engineering world are way beyond the comfort zone. Recently we had some ideas for a new laser window that operates at 700 degrees Celsius, which is 1,292 degrees Fahrenheit. Very few metals retain their strength at this temperature. Aluminum will melt. Just imagine all the goodness of high-end aluminum bike frames, car parts, cell phone housings just melting away. Steel will soften and barely hang in there pretending to support the load it supposed to carry. So, how in the world do you design a part that holds pressure and resists a force, in 700 degree heat? To make things worse, this part is supposed to be transparent. This is a window into an inferno. Well, we designed it.

Laser Window for High Pressure and High Temperature

This is a laser window. It is designed for 700 degrees C and 5,080 psi pressure, holding air. What kind of air you may ask is a 5,000 psi?  It’s designed for this pressure, but the operating pressure is less, it’s about 2,000 psi, which gives a factor of safety over 2 for this design. Our FEA calculations for the factor of safety, (FOS) and deformation show the flange details. We used only 1/4 of the flange to speed up the calculations, as the part is symmetrical around its axis.

Laser window Factor of Safety at high pressure

Laser window Deformation at high pressure

This laser window aperture diameter is 30 millimeters, to give a reference point for this design.

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