Comparison of jet engine types 盒 HAO TO NG UNT Propulsive efficiency comparison for various gas turbine engine configurations -Turboprop Hi Bypass Low Bypass Turbojet 60 40 In dry air at 20C(68F),the 20 speed of sound is 343 metres per second,1,235 km/h;767 mph 200 400 600 800 1000 airspeed (mph) MT333 Materials Applications Practice Prof.XiaoQi Chen A.21 Pressure and Temperature O TONG UND Ideal Gas Law PV=nRT Where P is the pressure of the gas,in Pascal V is the volume of the gas,in m3 n is the number of moles),in moles R is the ideal,or universal,gas constant,equal to the product of the Boltzmann constant and the Avogadro constant,8.314 J/(K.mol) T is the absolute temperature of the gas,in Kelvin Alternatively, P=p Rspecific T Where p is the density kg/m3,Rspecinc is the specific gas constant. MT333 Materials Applications&Practice Prof.XiaoQi Chen A22MT333 Materials Applications A.21 & Practice Prof. XiaoQi Chen Comparison of jet engine types In dry air at 20 °C (68 °F), the speed of sound is 343 metres per second ,1,235 km/h; 767 mph MT333 Materials Applications A.22 & Practice Prof. XiaoQi Chen Pressure and Temperature PV = nRT Where P is the pressure of the gas, in Pascal V is the volume of the gas, in m3 n is the number of moles), in moles R is the ideal, or universal, gas constant, equal to the product of the Boltzmann constant and the Avogadro constant, 8.314 J/(K·mol) T is the absolute temperature of the gas, in Kelvin Alternatively, P =  Rspecific T Where  is the density kg/m3, Rspecific is the specific gas constant. Ideal Gas Law