ESDU 74028
Onedimensional compressible gas flow in ducts.
Abstract:
ESDU 74028 gives curves and equations for use in the calculation of isentropic flow of a perfect gas; they are applicable to numerous practical situations. The curves are plotted for a range of ratios of specific heat capacities from 1 to 1.67 and for Mach numbers to unity. The equations can be applied to all Mach numbers provided no dissociation occurs. The conditions covered are 1. at a point in the flow, the ratio of static/total temperature, of static/total pressure, and of velocity/speed of sound in the gas brought isentropically to rest; 2. at a point in the flow, the ratios of kinetic/total pressure and of dynamic/kinetic pressure; 3. for the expansion of a gas through a nozzle with sonic flow at the throat, the ratio as a function of Mach number of the pressure, temperature and area at any point in the flow to the pressure, temperature and area respectively at the throat; 4. in the expansion from a reservoir, the ratio of density, temperature and velocity to the corresponding reservoir conditions as a function of pressure ratio and 5. three mass flow functions involving total pressure and temperature, total temperature but static pressure, and static pressure and temperature.Indexed under:
 Kinetic Pressure
 OneDimensional Flow
 Stagnation Conditions
 Total Pressure
 Total Pressure Coefficient
 Total Temperature
 Universal Gas Constant
Details:
Data Item ESDU 74028  

Format: 

Status: 

Previous Releases:  
ISBN: 

The Data Item document you have requested is available only to subscribers or purchasers.
 Subscribers login here.
 If you are not an ESDU subscriber you can
 find out how to subscribe, or
 purchase this Data Item from the IHS Standards Store.
The graphs listed below are available only to subscribers.
 Subscribers login here.
 If you are not an ESDU subscriber find out how to subscribe.
This Data Item contains 23 interactive graph(s) as listed below.
Graph  Title 

Figure 1  Ratio of static to total temperature 
Figure 2  Ratio of static to total pressure 
Figure 3  Ratio of local velocity to local 'total' speed of sound 
Figure 4  Ratio of kinetic pressure to total pressure 
Figure 5  Part 1  Ratio of dynamic pressure to kinetic pressure 
Figure 5  Part 2  Ratio of dynamic pressure to kinetic pressure 
Figure 6  Part 1  Ratio of local pressure to pressure where M = 1 
Figure 6  Part 2  Ratio of local pressure to pressure where M = 1 
Figure 6  Part 3  Ratio of local pressure to pressure where M = 1 
Figure 7  Part 1  Ratio of local temperature to temperature where M = 1 
Figure 7  Part 2  Ratio of local temperature to temperature where M = 1 
Figure 8a  Part 1  Ratio of local area to area where M = 1 (0.05 ≤ M ≤ 0.7) 
Figure 8a  Part 2  Ratio of local area to area where M = 1 (0.05 ≤ M ≤ 0.7) 
Figure 8b  Part 1  Ratio of local area to area where M = 1 (0.6 ≤ M ≤ 2.0) 
Figure 8b  Part 2  Ratio of local area to area where M = 1 (0.6 ≤ M ≤ 2.0) 
Figure 8b  Part 3  Ratio of local area to area where M = 1 (0.6 ≤ M ≤ 2.0) 
Figure 9  Isentropic expansion of air from rest 
Figure 10  Part 1  Mass flow function 
Figure 10  Part 2  Mass flow function 
Figure 11  Part 1  Mass flow function 
Figure 11  Part 2  Mass flow function 
Figure 12  Part 1  Mass flow function 
Figure 12  Part 2  Mass flow function 