Flow instruments are sets of apparatuses. These instruments were made for giving a quantification of fluid movement. We design a pitot-static tube connected to an inclined manometer and multi-tube manometer connected to the cylinder model. Both instruments are pressure-based flow instruments. We were designed for studying and demonstrating flow instruments by using a multi-tube manometer and an inclined manometer.
The first instrument, multi-tube manometer connected to cylinder model was composed of multi-tube manometer glass, base plate, back plate, back plate holder, reservoir holder, fluid reservoir, level adjust screw, back plate support, manometer holder, scale, cross-level, hose fitting, metal bar, and cylinder pipe. The second instrument, inclined manometer was composed of inclined manometer glass, scale, back plate, base plate, manometer holder and pitot-static tube. There were made by using turning, milling, laser-cutting, glass forming, and welding methods.
The experiment result of a multi-tube manometer, we set the pitch angle at 0-degree and set the wind tunnel speed at 220 volts which occurred the most obviously in line with the theory. For the inclined manometer, the results show the percentage error between airspeed from anemometer and airspeed from inclined manometer. Results are inverse with the wind tunnel speed. That means when the wind tunnel speed increases, the percentage error decreases.
This study gives us an opportunity to understand the instrument used in the aviation industry. We learn from the experiences in solving problems during conducting this project. The instruments which we produce will be one of the most useful equipment in department of aeronautical engineering laboratory for learning and researching. We hope our instrument could be of any assistance to an education in aeronautical engineering.