上海文夏大学 SHANGHAI JIAO TONG UNIVERSITY HALE UAV DESIGN 6.3. Constrain analysis......... .-29- 6.3.1. Determine the relationship of T/W and W/S at cruise requirements........-29- 6.3.2. Determine the relationship of T/W and W/S at takeoff condition.............-30- 6.3.3. Constrain analysis curve-32- 7.Aerodynamic configuration design........-34- 7.1.Joined wing design...................... -34 7.1.1. Joined wing introduction..-34- 7.1.2. Joined wing selection....... -36- 7.2. Airfoil selection-36 7.3. Wing span...... -39- 7.4. Taper rati0… .-39 7.5. Sweepback angle.......... .-40- 7.6. Mean aerodynamic chord... .-41- 8.Fuselage design and empennage design.... .-43- 8.1. Fuselage design.... …-43- 8.2. Empennage design.............. -45- 8.2.1.Airfoil selection....... …-46- 8.2.2.Tail size calculation................ -47- 9. Structure load design................. -49- 10. Powerplant-50- 10.1. Selection of engine.… -50- 10.1.1.Calculation of thrust at cruise....... …-50- 10.1.2.Calculation of maximum thrust....... …-50- 10.1.3.Choose an engine............ .-50- 10.2.Design of inlet.... …-51- 10.2.1.Working condition of inlet............. .-51- 10.2.2.Design of subsonic inlet.-52- 10.3. Design of nozzle.… -53- 10.3.1.The function and requirements of nozzle. -54- 10.3.2.The selection of nozzle's fundamental form. …-54- 10.3.3.The calculation of nozzle area........ .-54- 10.4.3D Model …-54- 11. Refine weight .-56- 11.1. Fuselage mass-56- 11.2. Nacelle mass... -57- 11.3. Tail 11.4. Landing gear,control surface and fixed equipment mass............... .-57- 11.5. Fuel mass.-57- 11.6. Ving mass...… -57- 11.7. Iteration of takeoff weight............. -58- 11.8. Estimation of center of gravity.......... -60- 12.Landing gear system. .-62- 12.1. Landing gear composition............ .-62- 12.2. The size of landing gear tire............ .-63- -4-HALE UAV DESIGN - 4 - 6.3. Constrain analysis............................................................................................... - 29 - 6.3.1. Determine the relationship of T/W and W/S at cruise requirements........ - 29 - 6.3.2. Determine the relationship of T/W and W/S at takeoff condition............. - 30 - 6.3.3. Constrain analysis curve............................................................................. - 32 - 7. Aerodynamic configuration design .................................................................................... - 34 - 7.1. Joined wing design ............................................................................................. - 34 - 7.1.1. Joined wing introduction............................................................................ - 34 - 7.1.2. Joined wing selection ................................................................................. - 36 - 7.2. Airfoil selection .................................................................................................. - 36 - 7.3. Wing span........................................................................................................... - 39 - 7.4. Taper ratio .......................................................................................................... - 39 - 7.5. Sweepback angle................................................................................................ - 40 - 7.6. Mean aerodynamic chord .................................................................................. - 41 - 8. Fuselage design and empennage design............................................................................ - 43 - 8.1. Fuselage design .................................................................................................. - 43 - 8.2. Empennage design ............................................................................................. - 45 - 8.2.1. Airfoil selection........................................................................................... - 46 - 8.2.2. Tail size calculation ..................................................................................... - 47 - 9. Structure load design ......................................................................................................... - 49 - 10. Powerplant................................................................................................................. - 50 - 10.1. Selection of engine............................................................................................. - 50 - 10.1.1. Calculation of thrust at cruise .................................................................... - 50 - 10.1.2. Calculation of maximum thrust.................................................................. - 50 - 10.1.3. Choose an engine....................................................................................... - 50 - 10.2. Design of inlet .................................................................................................... - 51 - 10.2.1. Working condition of inlet.......................................................................... - 51 - 10.2.2. Design of subsonic inlet. ............................................................................ - 52 - 10.3. Design of nozzle ................................................................................................. - 53 - 10.3.1. The function and requirements of nozzle .................................................. - 54 - 10.3.2. The selection of nozzle’s fundamental form .............................................. - 54 - 10.3.3. The calculation of nozzle area.................................................................... - 54 - 10.4. 3D Model............................................................................................................ - 54 - 11. Refine weight ............................................................................................................. - 56 - 11.1. Fuselage mass .................................................................................................... - 56 - 11.2. Nacelle mass....................................................................................................... - 57 - 11.3. Tail mass............................................................................................................. - 57 - 11.4. Landing gear, control surface and fixed equipment mass.................................. - 57 - 11.5. Fuel mass............................................................................................................ - 57 - 11.6. Wing mass.......................................................................................................... - 57 - 11.7. Iteration of takeoff weight ................................................................................. - 58 - 11.8. Estimation of center of gravity........................................................................... - 60 - 12. Landing gear system................................................................................................... - 62 - 12.1. Landing gear composition.................................................................................. - 62 - 12.2. The size of landing gear tire ............................................................................... - 63 -