Automatic control of test parameters for intake measurements in a low-speed wind tunnel

An automatic process control method has been developed for intake measurements in a low-speed wind tunnel. Three computers were used as supervisors for process control and data acquisition. They were connected via a local area network. In the low-speed range the inlet flows into the model were simulated by sucking air through the intakes. To calculate the Mach number in the compressor entrance plane it is necessary to measure the total pressure distribution and the mass flow using for the latter standardized nozzles in the piping system. The mass flows were adjusted by remote-controlled regulating valves. The designed control systems demonstrate that automation increases the efficiency of the wind tunnel measurement technique.<
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