VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University75710.18287/2541-7533-2009-0-3-2(19)-197-203UnknownAbout elaboration diagnostic methods of elements the pneumohydrosystem productions11sadohina@ssau.ru11sadohina@ssau.ru11sadohina@ssau.ruKonstruktorskoe Buro Khimavtomatiki, VoronezhVoronezh State Technological Academy0209200983-219720310062014Copyright © 2015, VESTNIK of the Samara State Aerospace University2015<p>This article describes the research work of influence of gas-filled "vessel-pipeline-valve" system element parameters on nature and quantitative indexes of initial pressure waves appeared after change of valve cross section. The mathematical model describing initiation of flow in the gas-filled pipeline during valve opening. The scheme of calculation of non-stationary movement of a nonviscous compressed liquid in the pipeline which area changes on time and longitudinal coordinate is offered.</p>Hydro-flowdynamicspneumohydrosystemdiagnostic methodsГидрогазодинамикапневмогидросистемыметоды диагностики