1 Fast Whole-Engine Stirling Analysis Rodger W. Dyson, Scott D. Wilson Roy C. Tew, and Rikako Demko Thermal Energy Conversion Branch August 16, 2005 Glenn Research Center at Lewis Field 2 Dual Opposed Stirling Convertors • High Efficiency, Low Mass Space Power Glenn Research Center at Lewis Field 3 Simulate Engine Only Glenn Research Center at Lewis Field 4 Operating Conditions Hot-End Temperature, K 923 Cold-End Temperature, K 353 Ambient Temperature, K 293 Frequency, Hz 80 Mean Pressure, Pa 2.429E+6 Power Piston Amplitude, mm 6.0e-3 Glenn Research Center at Lewis Field 5 Whole-Engine Simulation Glenn Research Center at Lewis Field Comparison with Sage 1D Results 6 Axisymmetric S age 1D Sage 1D Simulation Ambient No Ambient PV Power, W 79.65 68.77 70.14 Heat In, W 247.315 260.94 193.8 Heat Out, W 168.313 191.9 123.7 PV Efficiency .322 .264 .362 Pressure Ratio 1.209 1.187 1.187 Regen. ΔP., Pa 10466.3 15888 15790 Heater P, Pa 682 194 192 Cooler P, Pa 896 316 315 Pressure Amp., Pa 225269 203100 203200 Mean Pressure, Pa 2429130 2378000 2378000 Glenn Research Center at Lewis Field 7 Comparison with Experiment Thot Tcold Freq. Qin PV Qout C C Hz W W W TDC #13 646.0 80- 81.4 242.1 78.2 163.9 92.4 TDC #14 646.5 80- 81.4 250.4 79.6 170.8 94.4 Simulation 650.0 80 80 247.3 79.7 168.3 %Err-AVE 100.6 ? 98.2 100.4 100.9 100.6 Glenn Research Center at Lewis Field Pressure and Heat Transfer over Cycle 8 Glenn Research Center at Lewis Field Expansion and Compression Pressure 9 Glenn Research Center at Lewis Field Regenerator Pressure Drop 10 Glenn Research Center at Lewis Field