This website uses cookies primarily for visitor analytics. Certain pages will ask you to fill in contact details to receive additional information. On these pages you have the option of having the site log your details for future visits. Indicating you want the site to remember your details will place a cookie on your device. To view our full cookie policy, please click here. You can also view it at any time by going to our Contact Us page.

Shock Physics: NPL and Imperial to collaborate on pressure sensor calibration

28 June 2012

The National Physical Laboratory (NPL) and Imperial College London's Institute of Shock Physics (ISP) are working on a Knowledge Transfer Secondment project funded by EPSRC. High speed pressure sensors are used to monitor rapid changes in pressure, such as those found in turbines and internal combustion engines.

An aluminium diaphragm which is burst by gas pressure to generate a shock wave in the NPL 1.4 MPa shock tube
An aluminium diaphragm which is burst by gas pressure to generate a shock wave in the NPL 1.4 MPa shock tube

There is currently a requirement to ensure that these dynamic measurements are giving true real-time pressure values, so NPL is developing a source of pressure steps with the pressure change across the step traceable to the SI. Such pressure pulses can be produced using a shock tube where the rapid bursting of a metal diaphragm, exposed to high pressure on one side, generates a shock wave which provides a well-defined pressure step whose height can be calculated from measurements readily traceable to the SI.

These effects are being investigated in collaboration with the ISP who provide experience in the production of the diaphragms along with diagnostic equipment (high-speed cameras, velocity probes, deformation metrology) and help with the analysis of the data. The objective of the work is to be able to produce pressure pulses suitable for the calibration of high speed pressure sensors using bursting diaphragms in a shock tube.

For more information about the Institute of Shock Physics at Imperial College London, click here.

Contact Details and Archive...

Print this page | E-mail this page