Burst-pressure test fixture for pressure vessels dynamic rocket motors

摘要

A method for burst testing a vented pressure vessel accurately measures the true burst pressure of the vented pressure vessel. The method employs a burstpressure test fixture which comprises a plug and a gauge adapter member for substantially plugging the vent opening in a pressure vessel to be burst tested. The plug and gauge adapter member is adapted for receiving a transducer or pressure gauge that is integrally mounted with a pressure gauge tube which is insertably mounted in the plug and gauge adapter member. The vent opening which is substantially plugged with the tube member of the plug and gauge adapter member is free from stress during pressurization to burst pressure. The method requires that the plug and gauge adapter member be stationary, but the vented pressure vessel is allowed to move outwardly along the tube member during dynamic testing. The fit of the plug to the vent opening (i.e., the throat when the pressure vessel is a rocket motor) is a close enought fit as long as the fly off time of the pressure vessel is greater than the pressure rise time to burst pressure. The fixed position of the plugging member is independent of the pressure vessel during dynamic testing thus allowing the burst pressure that is measured to be the true burst pressure for the vented pressure vessel since the additional forces normally encountered during static testing where the plugging member and vented pressure vessel are stationary are not present in this method.