The isentropic efficiency of an axial flow compressor from the following data, pressure ratio=6, polytropic efficiency=0.85,inlet...
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The
isentropic efficiency of an axial flow compressor from the
following data, pressure ratio=6, polytropic efficiency=0.85,inlet...
A high-pressure axial compressor for a jet engine rotates at 15,000 rpm with an overall stagnation...
A high-pressure axial compressor for a jet engine rotates at 15,000 rpm with an overall stagnation pressure ratio of 8.5. The mass flow rate of air through the compressor is 16 kg/s and the stagnation conditions at inlet are 200 kPa and 450 K. The polytropic efficiency is 91%. a. If the mean radius is 0.24 m and this is constant throughout the compressor, calculate the total-to-total isentropic efficiency of the compressor and show that, for the stage loading to...
)An axial-flow turbine operating with an overall stagnation pressure of 8to 1 has a polytropic efficiency...
)An axial-flow turbine operating with an overall stagnation pressure of 8to 1 has a polytropic efficiency of 0.85. Determine the total-to-total efficiency of the turbine.b)If the exhaust Mach number of the turbine is 0.3, determine the total-to-static efficiency.c)If, in addition, the exhaust velocity of the turbine is 160 m/s, determine the inlet total temperature.Assume for the gas that Cp=1.175 kJ/(kg K) and R=287 kJ/(kg K).
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air to the compressor is 300 K, and the minimum work the air compressor can consume is 100.5 kJ/kg. The actual exit temperature of the air is? A. 400 K B. 411.11 K C.350 K D. 500 K
Q2) an axial compressor takes air axially (no swirl) from ambient at a total temperature of 27° a...
Q2) an axial compressor takes air axially (no swirl) from ambient at a total temperature of 27° and atmospheric pressure (tota of 101.3 kPa. The air is compressed to a total pressure of 121.56 kPa. The blade hub radius is 28 cm and the flow area is 0.1 m2. The shaft speed is 7000 rpm. The rotor turns the relative flow velocity 15°. The inlet relative flow angle is-60°. Determine (a) the mean radius (b) the relative and absolute velocity...
1. A combustion turbine possesses the following characteristics: Compressor 97 kPa and 30。C inlet conditions Pressure...
1. A combustion turbine possesses the following characteristics: Compressor 97 kPa and 30。C inlet conditions Pressure ratio: 5.5 Isentropic compression efficiency: 0.84 Combustor Outlet temperature: 1000 °C Pressure loss: 3 percent Fuel: natural gas Turbine Exit pressure: 100 kPa Isentropic expansion efficiency: 0.88 Generator Generator efficiency: 0.98 Determine the overall thermal efficiency, the heat rate, and the fuel-to-air ratio
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
For the helicopter gas turbine find the free turbine power for the following case: Engine mass fl...
For the helicopter gas turbine find the free turbine power for the following case: Engine mass flow rate 1.5kgs-1 Compressor pressure ratio 8:1 Compressor isentropic efficiency 0.89 Inlet temperature 300K Max cycle temperature 1100K High pressure turbine isentropic efficiency 0.93 Free turbine isentropic efficiency 0.95 275 wc--285k] kg-1, 275 v t-285k] kg. (T2s-544K, T2-574K, T4-826K, T4s-806K, P3/P4-2.9ro, p4/ps-2-668, T5s 623K, .T5-633K, wtf-200 kJ kg, W'tf-3eekw) 2 613 194 291 Note: for all calculations take Cp-1.004kJ kg-1 K-1, y-1.4
For the...
Consider a 5-stage axial compressor. From the stator outlet of one stage, to the rotor inlet...
Consider a 5-stage axial compressor. From the stator outlet of one stage, to the rotor inlet of the next stage. Maintaining continuity, what changes and what is generally assumed constant? (total pressure and temperature, static pressure and temperature, density, absolute flow angle (alpha), relative flow angle (beta), axial velocity, etc
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor ro...
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm. The overall stagnation pressure ratio due to compression is 10.1, it was recorded that the air flows at a rate of 16 kg/s. The stagnation properties at the inlet are 215 kPa and 460K. The poly-tropic efficiency of the compressor is 90%. Assume the mean radius of the compressor is constant and equal...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air to the compressor is 300 K, and the minimum work the air compressor can consume is 100.5 kJ/kg. The actual exit temperature of the air is? A. 400 K B. 411.11 K C.350 K D. 500 K
Q2) an axial compressor takes air axially (no swirl) from ambient at a total temperature of 27° and atmospheric pressure (tota of 101.3 kPa. The air is compressed to a total pressure of 121.56 kPa. The blade hub radius is 28 cm and the flow area is 0.1 m2. The shaft speed is 7000 rpm. The rotor turns the relative flow velocity 15°. The inlet relative flow angle is-60°. Determine (a) the mean radius (b) the relative and absolute velocity...
1. A combustion turbine possesses the following characteristics: Compressor 97 kPa and 30。C inlet conditions Pressure ratio: 5.5 Isentropic compression efficiency: 0.84 Combustor Outlet temperature: 1000 °C Pressure loss: 3 percent Fuel: natural gas Turbine Exit pressure: 100 kPa Isentropic expansion efficiency: 0.88 Generator Generator efficiency: 0.98 Determine the overall thermal efficiency, the heat rate, and the fuel-to-air ratio
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
For the helicopter gas turbine find the free turbine power for the following case: Engine mass flow rate 1.5kgs-1 Compressor pressure ratio 8:1 Compressor isentropic efficiency 0.89 Inlet temperature 300K Max cycle temperature 1100K High pressure turbine isentropic efficiency 0.93 Free turbine isentropic efficiency 0.95 275 wc--285k] kg-1, 275 v t-285k] kg. (T2s-544K, T2-574K, T4-826K, T4s-806K, P3/P4-2.9ro, p4/ps-2-668, T5s 623K, .T5-633K, wtf-200 kJ kg, W'tf-3eekw) 2 613 194 291 Note: for all calculations take Cp-1.004kJ kg-1 K-1, y-1.4
For the...
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm. The overall stagnation pressure ratio due to compression is 10.1, it was recorded that the air flows at a rate of 16 kg/s. The stagnation properties at the inlet are 215 kPa and 460K. The poly-tropic efficiency of the compressor is 90%. Assume the mean radius of the compressor is constant and equal...
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