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The Effect Of The Slat System Essay

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In order to gauge any effects the slat system, with various weights, may have on the shock wave, several baseline tests were run. These tests did not have the device installed in order to record and understand the basic performance of a shock wave coming straight from the shock tube. To record the pressure profile of the wave within the expansion section, GageScope was used. A trigger was set to detect a rapid rise in voltage from the pressure transducer, and the program would record 1ms before and 10ms after the trigger. The initial baseline test can be seen in Figure X below. For a greater focus on the effects of the device on the shock wave, all charts for comparison has been narrowed to 2ms after the trigger. The two significant runs showing the pressure profile of the shock wave are shown in Figures X & Y.

Figure x: Baseline Test 1 Full Recording

Figure x: Baseline Test 1 - 2ms Recording

Figure x: Baseline Test 2

These figures show that the pressure rises from atmospheric (0mV) to peak pressure in a rise time of around 0.000039 seconds, or 39 µs. This is representative of a shock wave due to a nearly instantaneous rise time. Baseline test 1 burst at 51 psi while baseline test 2 burst at 53 psi.

The initial design did not perform effectively at achieving its intended functions when installed and tested with the shock tube. Upon firing the shock tube, the slats would not rotate. Several firings were attempted, all resulting in no rotation of the rods. The

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