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(65) Consider the following reaction of benzene (CoHo) with air at 25 C and 150 kPa total pressur...
An air-breathing gas-turbine jet engine operates at SSSF with complete combustion of 1 kmol / s of liquid ethanol fuel (C₂H₅OH)
An air-breathing gas-turbine jet engine operates at SSSF with complete combustion of 1 kmol / s of liquid ethanol fuel (C₂H₅OH). The given air-fuel ratio is 33 kg-air/kg-fuel. The constant pressure combustion process (2 → 3) results in a small amount of heat transfer out to the surroundings. Assume the inlet air is composed of 21 % O₂ and 79 % N₂(1 O₂+3.76 N₂)FIND the theoretical air-fuel ratio, AFTHEORETICAL= _______ kg-air/kg-fuelFIND the concentration of CO₂ in the exhaust gas on...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. A...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. Assuming that the flow is steady and that the effects of wall friction can be ignored, find the temperature, pressure, and Mach number at which the air leaves the duct. Assume that the air behaves as a...
Formul Question 2 (50 points): Propane gas and burns with 20% excess air entering (molar C, Hs) at 25 C.I atm enters a reactor operating at steady state at 25 C l atm of the carbon entering with...
Formul Question 2 (50 points): Propane gas and burns with 20% excess air entering (molar C, Hs) at 25 C.I atm enters a reactor operating at steady state at 25 C l atm of the carbon entering with the fuel, 94% s) appears in the products at CO2 and the rest as CO. Heat transfer from the reactor occurs te of 1.4 x 10° kJ per kmol or propane. Use your ideal gas tables to answer this question. ite the...
nominal temperature of 660K and heptane 3. Assume that air enters a combustor at a (C-H16)...
nominal temperature of 660K and heptane 3. Assume that air enters a combustor at a (C-H16) enters at the reference temperature (298.15 K) creating products of combustion leaving at a nominal temperature of 1540 K. Values given in the table below are in units of kJ/kmol. Values are also given for the heat of formation. In the case of the H2O this would be for a gaseous product. (a) Write a reaction equation for heptane burning with air with c*100%...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Consider the effects of exhaust gas recirculation on the combustion process. Mixing exhaust gas with the...
Consider the effects of exhaust gas recirculation on the combustion process. Mixing exhaust gas with the fuel-air gas changes the initial temperature, density, molecular weight and effective heat of combustion of the charge within an SI engine. Consider an SI engine with compression ratio 9 which uses fuel-air mixture of the equivalence ratio 1.1. The fuel-air mixture enters the intake manifold at a pressure p1 and temperature 290K. Perform an analysis of the effect of EGR on an ideal cycle....
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
Methane gas is burned with 30 percent excess air. This fuel enters a steady- flow combustor at 0.8 atm and 25oC and is mixed with the air. The products of combustion leave this reacto...
Methane gas is burned with 30 percent excess air. This fuel enters a steady- flow combustor at 0.8 atm and 25oC and is mixed with the air. The products of combustion leave this reactor at 0.8 atm and 1600 K. Determine the equilibrium composition of the products of combustion and the amount of heat released by this combustion in kJ/kmol methane. Use data from the tables CH 25°C CO2, H3O chamber NO. O2 N2 1600 K 30% excess air 25°C...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. Assuming that the flow is steady and that the effects of wall friction can be ignored, find the temperature, pressure, and Mach number at which the air leaves the duct. Assume that the air behaves as a...
Formul Question 2 (50 points): Propane gas and burns with 20% excess air entering (molar C, Hs) at 25 C.I atm enters a reactor operating at steady state at 25 C l atm of the carbon entering with the fuel, 94% s) appears in the products at CO2 and the rest as CO. Heat transfer from the reactor occurs te of 1.4 x 10° kJ per kmol or propane. Use your ideal gas tables to answer this question. ite the...
nominal temperature of 660K and heptane 3. Assume that air enters a combustor at a (C-H16) enters at the reference temperature (298.15 K) creating products of combustion leaving at a nominal temperature of 1540 K. Values given in the table below are in units of kJ/kmol. Values are also given for the heat of formation. In the case of the H2O this would be for a gaseous product. (a) Write a reaction equation for heptane burning with air with c*100%...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
Methane gas is burned with 30 percent excess air. This fuel enters a steady- flow combustor at 0.8 atm and 25oC and is mixed with the air. The products of combustion leave this reactor at 0.8 atm and 1600 K. Determine the equilibrium composition of the products of combustion and the amount of heat released by this combustion in kJ/kmol methane. Use data from the tables CH 25°C CO2, H3O chamber NO. O2 N2 1600 K 30% excess air 25°C...
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