AAWSAP DIRD, Laser Lightcraft Nanosatellites, November 2010

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UNCLASSIFIED/;'POR: OPPICIAL USE O14Lf
•
Total mass flow rate, Qtota1 = 240 kg/sec [for a total (run time) mass of
72 metric tons].
• Plenum Chamber
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Volume, V = 0.5 m x 3.0 m x 1.5 m = 2.25 m3 .
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Static pressure, P = 2.02 x 105 Pa (or 2 atmospheres).
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Sonic orifice plate perforation = 17. 5%.
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Flow screen loss > 0.2 to 0.3.
•
Skin friction loss ~ 0.08.
• Gas Storage Tank
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Run time = 300 seconds & 4 to 5 runs.
•
Pressure, P = 2.066 x 107 Pa (or 200 atmospheres).
•
Volume, V = 68 m3 x 4.
• Acoustics Suppression
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Pumping induced medium homogeneity, LlP/P = 0.94@ Ep = 300 J/1.
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Acoustic suppression
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Flow direction: expansion horn provides impedance match eliminating
reflection of pressure waves.
•
Normal to flow direction: using acoustics muffler to dump out
transverse pressure waves.
•
Muffler requirements: attenuation factor< 0.55; number of bounces
between pulses n = 8.
AM
I-·
Ml
SP
·-I
M2
Cavity Length : 36.Sm
End Mirrors : Ml Concave (Rl =97m)
M2 Convex ( R2=24m)
Gain Length : 3m
Magnification : M=4
Aperture : 0.3 0.3 m
Output Scraper: SP 36x36 cm (outer)
7.Sx7.5 cm (inner)
Acoustic Muffler : AM
Electrodes : E
Figure 16. Schematic of Power Oscillator Optics c291_
UNCLASSIFIED,'fFOA QFFISIAL 1!181!! 8HLY
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