High-bypass Ratio, Separate-exhaust Turbofan engine: Study on Flight Mach Number and Inlet Temperature
Ruiwen Gao a, Kiumars Khani Aminjan b, Milad Heidari c, Pooyan Rahmanivahid d, Samira Marami Milani e and Morteza Khashehchi f
aCollege of Information Engineering, Shanghai Maritime University, 1550 Haigang Avenue, Lingang New City, Pudong New Area Shanghai, 201306, China. 202110413034@stu.shmtu.edu.cn
bFaculty of Mechanical Engineering, University of Guilan, PO Box 3756-41635, Rasht, Iran. kiumars.khani67@gmail.com
cMechanical Engineering Department, Global College of Engineering and Technology (GCET), P.O. Box 2546 CPO Ruwi 112, Muscat, Sultanate of Oman. milad@gcet.edu.om
dMechanical Engineering Department, Global College of Engineering and Technology (GCET), P.O. Box 2546 CPO Ruwi 112, Muscat, Sultanate of Oman. pooyan@gcet.edu.om
eFaculty of Mechanical Engineering, Islamic Azad University, Sofian Branch, Sofian, East Azarbaijan, Iran. samira.marami@gmail.com
fSystems engineering department, Military technological college, Muscat, Oman. morteza.khashehchi@mtc.edu.om
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Abstract:
In this study, the effects of Mach Number and air temperature on high-bypass ratio, separate-exhaust turbofan engine efficiency, and fuel consumption were investigated. A coding method with real data was used and the comparison of results with valid data indicated that the error was below 2%. The results showed that with the increase of Mach Number from 0.1 to about 1.1, the overall efficiency and the propulsive efficiency increased, but the thermal efficiency was constant. Further, with the increase of Mach Number from 1.1 to 1.5, the three mentioned efficiencies decreased. The results showed that an increase in the Mach Number always increases the thrust-specific fuel consumption, but this increase is much more significant in the range of 1.3 to 1.5 and is associated with a sudden increase of 200%. It was observed that increasing the temperature from 210 K to 333 K had no tangible effect on any of the efficiencies and the efficiencies remained constant, but the fuel consumption increased with a constant slope of about %24.
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