Analytical and Numerical Investigation of Transient Gas Blow down

An analytical and numerical solution for unsteady discharge of gas through blow down stack open to atmosphere based upon the volume model analysis is developed. The time dependent, one-dimensional mass conservation equation was used in the analysis with neglecting the effects of flow and friction along the main pipe. Also isothermal gas expansion is assumed inside the main pipe and isentropic flow through the stack. The results obtained were compared very well with available data and published model