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 Wisconsin Institute for Nuclear Safety

## Gas Dynamics Calculator

Shock Tube Calculator
Enter values and press the "Calculate" button
State 1 is driven, 2 is shocked and 5 is reflected.
State 4 is the driver.
Input

Driven Gas
Mach Number (Desired)
Pa, Initial Pressure, Driven Section
K, Initial Temperature, Driven Section
Driver Gas
K, Initial Temperature, Driver Section

Output
 State 1 State 2 State 4 State 5 Pressure MPa Temperature K Density kg/m3 Sound Speed m/s Velocity 0 0 0 m/s
Notes:
MW = Specific heat ratio =
Initial wave speed = m/s
Reflected wave speed = m/s, MR =
Approximate driver pressure ( factor for area contraction) = psig
View the Equations
Some fluid Properties
Constants and Dimensionless Numbers
Specific Heat Ratio as a Function of Temperature

Timing Issues
Input
m, Distance Between Pressure Transducers
ms, Time Between Pressure Transducers
m, Distance Between Trigger Transducer and Window Centerline
m, Distance Between Trigger Transducer and Interface
Output
m/s, Actual Wave Speed
Actual Mach Number
ms, Estimated Delay Time for Shock
ms, Estimated Delay Time for Membrane

Boost Tank
Input
m3, Volume of the Driver
m3, Volume of the Boost Tank
psig, Diaphragm Rupture Pressure
%, Less than Rupture Pressure (for Pre-boost)
%, More than Rupture Pressure (for Post-boost)
Output
psig, Pre-boost Driver Pressure
psig, Post-boost Driver Pressure
psig, Required Boost Tank Pressure

Department of Engineering Physics | UW Home
 File last updated: Aug. 7, 2008 Feedback, questions or accessibility issues: oakley@engr.wisc.edu Copyright © 2004 The Board of Regents of the University of Wisconsin System.