A simple and low cost system to measure delay times in pneumatic systems

It is often necessary to correct for delay times in the units of a measurement channel, especially in the case of flight tests. In a pressure measurement channel the sensing orifice is connected to the transducer by a pressure line which may be several meters in length. In this case the pneumatic delay time might well be the major contribution...

Revised results of the unsteady transonic pressure measurements on the LANN model

A new postprocessing procedure is applied on the data, acquired in 1981 during the unsteady transonic pressure measurements on a transport-type supercritical wing (LANN-model), oscillating in pitch. The new procedure takes the influence into account of the local boundary layer on the dynamic response of the pressure tubes. This report presents...

Boundary-layer effects in unsteady pressure measurements with tubes

An experimental investigation revealed that the d5mamic response of a given pressure tube depends not only on the mean local pressure and the frequency, but also on the pressure amplitude and the boundary-layer at the tube entrance. By analyzing the flow at the entrance of the tube, the parameters are determined, which possibly play a role in...

Method for determining the time delay of the pitot-static tubing system of aircraft

Nabeschouwing drukmetingen aan de bovenzijde van het stortebed bij een weigerende schuif: Stormvloedkering Oosterschelde

Stormvloedkering Oosterschelde: Drukken aan de bovenzijde van de drempel en het stortebed bij een weigerende schuif : interim verslag modelonderzoek