17. I need the Equations for the nozzle of gas turbine engine of an airplane. (Balance of energy and mass) everything
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- 19. A spacecraft, traveling in deep space, fires thrusters to achieve a change in speed of 2.8 km/s. If the specific impulse of the thrusters is 300 s, what is the ratio of the initial spacecraft mass to the spacecraft mass after the thrusters have fired? a. 0.9 3000/2.8 2.6 C. 8.2 d. None of the above 20. The state vectors for an Earth-orbiting spacecraft at a given point in tim 54.5. Values of pressure (kPa) measured at various stations of a zero-reaction gas turbine stage, all at the mean blade height, are shown in the table given below. Stagnation pressure Nozzle entry 414 Nozzle exit 400 Static pressure Nozzle exit Rotor exit 207 200 The mean blade speed is 291 m/s, inlet stagnation temperature 1100 K, and the flow angle at nozzle exit is 70° measured from the axial direction. Assuming the magnitude and direction of the velocities at entry and exit of the stage are the same, and the axial velocity remains constant, determine the total to total efficiency of the stage. Assume a perfect gas with Cp = 1.148 kJ/(kg °C) and y = 1.333.Question 19 The figure below shows a turbine-driven pump that provides water to a mixing chamber located dz = 25 m higher than the pump, where mass flow rate is 50 kg/s. Steady state operating data for the turbine and pump are labeled on the figure. Heat transfer from the water to its surroundings occurs at a rate of 2 kW. For the turbine, heat transfer with the surroundings and potential energy effects are negligible. Kinetic energy effects at all numbered states can be ignored. Steam P3 = 30 bar T3 = 400°C 3 Turbine ▼ P4= 5 bar T₁ = 180°C h₂ = 417.69 kJ/kg Ocv = 2 kW Pump dz +Mixing chamber Saturated liquid water m₁, P₁ = 1 bar
- 2. A turbine operates under steady flow conditions receiving steam at the following state: pressure 1200 kilo pascal, temperature 188 degrees celsius, Enthalpy 2785 kilojoule per kilogram, speed 33.3 meter per second and elevation 3 m the steam leaves the turbine at the following state; pressure 20 kilo pascal, enthalpy 2512 kilojoule per kilogram, speed 100 m per second and elevation 0 m. Heat is lost to the surroundings at the rate of 0.29 kilojoule per second. if the rate of steam flow through the turbine is 0.42 kg per second. What is the work in kJ/kg and what is the power output of the turbine in kw?5. Discuss the different modeling assumptions for a Rankine power cycles. Please select all answers that apply: a) Each component is analyzed as a control volume at steady state. b) The turbine and pump operate adiabatically. c) Kinetic and potential energy changes are negligible . d) Source of energy isentropic. e) Sink of energy is isentropic.1) One of the common devices used in Engineering is a nozzle to transfer fluids such as air. Assume a steady-state flow and air as an ideal gas with the following parameters: Inlet: Mass flow = 2.1 kg/s V1 = 0.72 m³/kg T1 = 600 K A = 240 cm? Outlet: V2 = 2.7 m³/kg A2 = 40 cm2 a) What is the air pressure at the outlet. b) What is the velocity of the airflow at the inlet. c) What is the velocity of air at the outlet.
- 18. A centrifugal air compressor compresses air at the rate of 20 kg/min from 1 bar to 2 bar. The temperature increases from 20°C to 120°C during the compression. Determine actual and minimum power required to run the compressor. The surrounding air temperature is 20°C. Neglect the heat interaction between the compressor and surroundings and changes in potential and kinetic energy. [Ans. 24.2 kW]This subject is thermodynamics 1 thankyou?I need help with thermodynamics
- Course: ThermoDynamicsDerive the 7 general property equation of the following thermodynamics processes: a. ISOMETRIC PROCESSThe figure below shows a turbine-driven pump that provides water to a mixing chamber located dz = 5 m higher than the pump, where in = 50 kg/s. Steady-state operating data for the turbine and pump are labeled on the figure. Heat transfer from the water to its surroundings occurs at a rate of 2 kW. For the turbine, heat transfer with the surroundings and potential energy effects are negligible. Kinetic energy effects at all numbered states can be ignored. h2 = 417.69 kJ/kg Mixing chamber Ocy = 2 kW Steam P3 = 30 bar T3 = 400°C dz Turbine Pump P4 = 5 bar T4 = 180°C Saturated liquid water m, Pi = 1 bar Determine: (a) the magnitude of the pump power, in kW. (b) the mass flow rate of steam, in kg/s, that flows through the turbine.