Numerical Investigation of the Transient Behavior of a Hot Gas Duct under Rapid Depressurization

Table 1

Input parameters for numerical simulation.

Symbol	Parameter	Numerical value
	Initial pressure	11 bar
	Depressurization amplitude	1.0~9.6 bar
	Time constant of depressurization	0.00181 s
	Length of insulation	0.88 m
	Cross section of surge channel	0.00755 m^2
	Interior volume of insulation	0.085 m^3
	Hydraulic diameter of surge channel	0.02 m
	Gas constant for helium	2077.12 J/kg⋅K
	Adiabatic exponent	1.667
	Initial temperature helium	300 K
	Coefficient of friction	0.016
	Effective aperture of surge channel	0.0018 m^2
	Effective aperture of perforated tube	0.0006 m^2