Problem 1 (20 points) Air at 35°C, 105 kPa, flows in a 100 mm x 150...
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...
J. An adiabatie gas turbine espands air at 1300 kPa and 500P C to 100 kPa and 127"C Au ers turbine through a 02-m opening with an average velocity of 40 m/s, and exhausts through a 1-m opening Detormine (a) the mass fnow rate of air through the turbine and (b) the power produced by the turbine For air, take the ideal gas constant and specific heat value at constant pressure as o Yue Determine (a) the mass flow rate...
Air flows through a converging-diverging nozzle/diffuser. Assuming isentropic flow, air as an ideal gas, and constant specific heats determine the state at several locations in the system. Note: The specific heat ratio and gas constant for air are given as k=1.4 and R=0.287 kJ/kg-K respectively. --Given Values-- Inlet Temperature: T1 (K) = 360 Inlet pressure: P1 (kPa) = 583 Inlet Velocity: V1 (m/s) = 105 Area at inlet (cm^2) = 8.2 Mach number at the exit = 1.86 a) Determine...
At steady state, air at 200 kPa, 325 K, and mass flow rate of 1.0 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. The inlet cross-sectional area is 6 cm2. At the duct exit, the pressure of the air is 100 kPa and the velocity is 300 m/s. Neglecting potential energy effects and modeling air as an ideal gas, determine a. the velocity of the air at the inlet, in m/s. b. the temperature of the...
Problem #4 (30 Points) Air at 110 kPa and 323°K flows upward through a 0.06m diameter inclined duct at a volume flow rate of 0.045 m3/s. The duct diameter is then reduced to 0.04m through a reducer. The pressure change across the reducer is measured by a water monometer (Density 1000 kg/m3) The elevation difference between the two points on the center of the pipe where the two arms of the monometer are attached is 0.2m. (1) Determine the density...
1. (15 pts) A converging-diverging nozzle has an area ratio of 2, i.e., the exit (or duct) area is 2 times the throat area, which is 80 cm2. The nozzle is supplied from a tank containing air (y 1.4 and R 287 J/kg K) at 100 kPa and 300K. For both cases shown in Fig. , find the maximum mass flow possible through the nozzle and the range of back pressures over which the mass flow can be attained. For...
1. (15 pts) A converging-diverging nozzle has an area ratio of 2, i.e., the exit (or duct) area is 2 times the throat area, which is 80 cm2. The nozzle is supplied from a tank containing air (y 1.4 and R 287 J/kg K) at 100 kPa and 300K. For both cases shown in Fig. , find the maximum mass flow possible through the nozzle and the range of back pressures over which the mass flow can be attained. For...
Problem 4.018 SI Air enters a horizontal, constant-diameter heating duct operating at steady state at 300 K, 1 bar, with a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The flow area is 0.05 m2 Assuming the ideal gas model with k-1.4 for the air, determine: (a) the mass flow rate, in kg/s, (b) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer to the air, in...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger - water (inlet) T = 20°C Pw = 100 kPa m = 0.025 kg/s Problem sketch Solve with EES. Document all necessary balances The problem sketch illustrates a heat exchanger in which hot air is used to generate steam. Air enters the heat exchanger at 1a, in = 320C, Pa = 100 kPa, and ma -0.5 kg/s. Model air as an ideal gas with constant...
Air at 26°C and 1 atm passes steadily through a circular pipe at a mass flow rate of 0.035 kg/s. You may assume air is an ideal gas with a gas constant of 287 J/kg/K, and its viscosity is 0.000018 kg/(ms). a. What is the minimum pipe diameter for this flow to be laminar?