Auxiliary instruments

Starting from the initial validation of the vertical test cell to the final measurements of the cylinder wake, various instruments, other than HWA and PIV have been used. A brief introduction to these instruments is presented below.

Digital Micromanometer

The pitot-static tube was used for velocity measurements in the undisturbed flow. It was connected to a high quality differential pressure micromanometer (model FC012, Furness Controls) with a pre-calibrated velocity output and a digital display. The micromanometer uses a capacitance-type differential pressure transducer. It measures differential pressures upto 1.99 mm with a resolution of 0.01 mm . It is equipped with a temperature correction chart to account for changes in the room temperature. The maximum measurable velocity with this manometer is equal to 5:6 m/s. The pitot-static tube and digital manometer combination have been used for calibration experiments of the hotwire anemometer.

Fig 3.22: Picture of the micromanometer (left) and pitot static tube (right) used during the experiment