3.3-10 Maximum Structural Temperature vs Transmitted Power............. .. 3.3-14 3.3-11 Microwave Power Transmission System Structure ............................ 3.3-16 3.3-12 Beam Cap Element Geometries.................................................................. 3.3-17 3.3-13 Typical Thermal Model for Structural Member..................................... 3.3-18 3.3-14 Maximum Tube Temperature as a Function of Antenna Surface Temperature With Tube Inner Wall Emissivity as a Parameter . . 3.3-19 3.3-15 Maximum Temperature Difference Across a Tubular Structural Member as a Function of Antenna Surface Temperature With Tube Inner Wall Emissivity as a Parameter................ 3.3-21 3.3-16 Thermally Induced Stresses and Minimum Wall-to-Radius Ratios for Tubes..................................................................... 3. 3-21 3.3-17 Comparison of Temperature Profiles in High-Hat Section for . ., = 0.9 and 0.1......................................................... 3.3-23 inside 3.3-18 Temperature Distribution Within Triangular Shaped Structural Member............................................................... 3.3-24 3.3-19 Maximum Temperature and Temperature Difference in Triangular Member............................................................... 3.3-26 3.3-20 Comparison of Maximum Temperature for Different Beam Cap Element Geometries ........................... 3.3-28 3.3-21 Comparison of Maximum Temperature Difference for Various Geometries............................................................... 3.3-28 3.3- 22 Temperature Distribution in a Beam Cap Member Located 1 Meter Above Antenna Surface............................... .. 3.3-29 3.3-23 Temperature Distribution in a Beam Cap Member Located 1 Meter Above Antenna Surfacee................................................................ 3. 3-30 3.3- 24 Temperature Difference Between Beam Cap Members Located Different Distances Above Antenna Surface.................... 3.3-33 3.3- 25 Temperature Difference Between Beam Cap Members Located Different Distances Above Antenna Surface................... 3.3-33 3.3- 26 Column Temperatures.................................................................................. 3.3-36 3.3- 27 Waste Heat Flux at Center of Antenna as Function of Scale Factor ........................................................................... 3.3-36 3.3-28 Waste Heat Profile for Various Values of Scale Factor.................... 3. 3-37 3.3-29 Maximum Temperatures as a Function of Scale Factor.................... 3. 3-39 3.3-30 Thermal Performance of MPTS With and Without Heat Pipes . . . 3.3-40 3.3-31 Alternate Structural Arrangements.......................................................... 3.3-42 3.3-32 Weight Relationship for Different L/D (Length Tube/Diameters) . 3.3-43
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