| Aerothermodynamic Off-Design Performance Study of a Fixed Double Bypass Duct Turbofan Engine |
| کد مقاله : 1076-FDC |
| نویسندگان |
|
الیاس لکزیان *1، حمیدرضا فرشی فصیح1، رضا مدانلو2 1پردیس علوم و فناوری نوین، دانشکده مهندسی هوافضا 2دانشجوی کارشناسی ارشد مهندسی هوافضا(گرایش جلوبرندگی)،پردیس علوم و فناوری نوین، دانشکده مهندسی هوافضا |
| چکیده مقاله |
| In this paper, a turbofan engine with double bypass duct (DBP) was studied at design point and off-design conditions. This engine is a separate exhaust, two spool turbofan engine with bleed, turbine cooling, power extraction, and convergent exhaust nozzles. Bypass ratio of main and secondary duct is equal one. Also, a typical turbofan engine with one bypass duct is considered as the benchmark case (simple engine) and its bypass ratio is 2. Simulation results show that DBP engine produces 5.4% thrust more than simple engine at M=0.8 and altitude 9296.4 m (design point). DBP engine thrust is more than simple engine at SL altitude and 9296.4 m at off-design conditions in all flight Mach numbers ranging from 0 to 0.8. Moreover, double bypass duct engine SFC is lower than simple engine at pre-mentioned off-design conditions. Thrust per mass flow rate (F/\dot{m}) was also studied. By increasing F/\dot{m}, specific fuel consumption is decreased for both engine types. Another interesting finding is that at constant F/\dot{m}, DBP engine SFC is lower than simple engine at all flight altitudes. |
| کلیدواژه ها |
| turbofan engine, double bypass, duct, off-design, thrust, specific fuel consumption. |
| وضعیت: پذیرفته شده |