A constant-area duct that is 20 cm in length by 2 cm in diameter is connected to a reservoir through a converging nozzle, as shown in Figure 9.13. For a reservoir pressure and tem- perature of 1 MPa and 500 K, determine the maximum air flow rate in kilograms per sec- ond through the system and the range of back pressures over which this flow is realized. Repeat these calculations for a converging nozzle with no duct. Assume that f is equal to 0.032 and that y1.4. f-0.032 D-2 cm Isentropie flow D1,000 kPa T- S00 K 20 cm

A constant-area duct that is 20 cm in length by 2 cm in diameter is connected to a reservoir through a converging nozzle, as shown in Figure 9.13. For a reservoir pressure and tem- perature of 1 MPa and 500 K, determine the maximum air flow rate in kilograms per sec- ond through the system and the range of back pressures over which this flow is realized. Repeat these calculations for a converging nozzle with no duct. Assume that f is equal to 0.032 and that y1.4. f-0.032 D-2 cm Isentropie flow D1,000 kPa T- S00 K 20 cm

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.16P

See similar textbooks

Similar questions

For a fixed compressor inlet velocity and flow area, explain the effect of increasing compressor inlet temperature (i.e., summertime operation versus wintertime operation) on the inlet mass flow rate and the net power output with all other parameters of the problem being the same.
A fan is used to transport CO2 gas (MW = 44 g/mol) gas at rest @ 700mmHg. At the discharge end, the pressure is 765mmHg, and the velocity is 100 m/s. Assuming the flue gas behaves ideally, and the process is isothermal, with the temperature maintained at 100C. Determine the theo. power required to move 45000 m /h of the flue gas.
Assuming the clearance is negligible for a single stage compressor with the following data.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/min Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1.Evaluate the mass flow rate of air inside the compressor operating isentropically in kg/min to 3 decimal places.
Assuming the clearance is negligible for a single stage compressor with the followingdata.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1. What is the power input to the compressor in kW to 2 decimal places if the compression is polytropic compression process with n=1.25? 2. What is the delivery temperature of air for an isentropic compression process in Kelvin to 1 decimal place? 3. What is the power input to the compressor in kW to 3 decimal places if the compression reversible isothermal?
Air enters a fan through a duct at a velocity of 6.5 m/s and an inlet staticpressure of 2.5 cm H2O less than atmospheric pressure. The air leaves the fan through aduct at a velocity of 11.5 m/s and a discharge static pressure of 7.62 cm H2O above theatmospheric pressure. If the specific weight of air is 1.20 kg/m3 and the fan delivers 9.45m3/s, determine the fan theoretical power and the fan efficiency when the power input tothe fan is 13.75 kW at the coupling?
Determine the static fan efficiency if total fan mechanical efficiency is 70% and air is measured at 25 deg C and 760 mmHg for a fan that draws 1.42 cubic meters of air per second at a static pressure of 2.54 cm of water through a duct 300 mm diameter and discharges it through a duct of 275 mm diameter.
Nitrogen at a pressure of 200 kPa and a temperature of 25°C, flow at a velocity of 20 m/s through a pipe with a diameter of 35 mm Working substance:______system:______ Sketch :
Given that μ = 0.25Katm−1 for nitrogen, calculate the value of its isothermal Joule–Thomson coefficient. Calculate the energy that must be supplied as heat to maintain constant temperature when 15.0 mol N2 flows through a throttle in an isothermal Joule–Thomson experiment and the pressure drop is 75 atm.
1. Derive the volumetric efficiency of ideal reciprocating compressor2. Critically discuss the parameters that would affect the volumetric efficiency of a reciprocating compressor
A dry gas well equipped 30 MMcfd with 85psig tubing pressure must be compressed to 300 psig for sales by centrifugal compressor design What is the amount of actual power required to perform this job, estimate the minimum number of compression stages required for optimum compression efficiency? Additional data nsty = 0.069 cuft , suction temperature 85 K = 1.2 . theoretical speed N - 12200 rpm average deviation factor -0.85atmospheric pressure (assumed xd)=14.71 psia
At a particular operating condition, an axial flow compressor has a reaction of 0.6, a flow coefficient of 0.5 and a stage loading, defined as Aho U2 of 0.35. If the flow exit angles for each blade row may be assumed to remain unchanged when the mass flow is throttled, determine the reaction of the stage and the stage loading when the air flow is reduced by 10% at constant blade speed.
Assuming the clearance is negligible for a single stage compressor with the following data.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/min Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1.What is the power input to the compressor if compression is isentropic in kW to 3 decimal places?