An Experimental Investigation of Short Diffusers for Gas Dynamic Lasers
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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One of the largest components of a gas dynamic laser is the diffuser. A significant reduction in the size of this component could represent a significant savings in the size and weight of the entire system. The purpose of this investigation was to examine several short supersonic diffuser designs with fixed walls and no boundary layer control. Thick diffusers with shallow ramp angles are supposed to provide optimum pressure recovery for fixed diffusers. It was found in this investigation, however, that no loss of pressure recovery is suffered when steep ramp angles and thin diffusers are used. Steep ramps and thin diffuser sections would serve to minimize both the length and weight of supersonic diffusers. Start-up times were also investigated.
- Lasers and Masers