air spindles are one of the main elements of precise machine tools. vibration of these spindles is one of the vital issues necessary for investigation. among parameters which influence air spindle vibrations are rotational speed, compression air method, input nozzle diameter, air gap pressure. in this study using ansys, the effects of air gap thickness on air spindle vibrations have been invest...

Water-hammer is a transient condition which may occur in a network as a result of rapid or slow valve closures, pump failures, changes in turbine loading, etc. It creates high and low pressure waves which travel along the system and decay as a result of wall shear stress. Comparison o experimental and theoretical results revealed the failure of steady or quasi-steady models in correctly predict...

Brand modern technology of leak detection by using pressure transient analysis has been developed and interested to research due its advantages such as low cost, simplicity convenient use. This uses the concept signal reflections which identify pipeline features. The method used in this study was a transducer (piezoelectric sensor) obtain respond generated rapid opening closing solenoid valve. ...