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an extremely small "pin hole" si gh the “pin hole"?

an extremely small "pin hole" si gh the “pin hole"?

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Kindly answer the Extra question asked, stating what will happen to the Mach number if there is a pin-hole cross section. Thanks!

In part c you're asked what would happen if the area were reduced more than necessary to reach Mach 1? If you actually did this, if you reduced the cross-sectional area to an extremely small "pin hole" size, what would the Mach number be through the "pin hole"?
Transcribed Image Text:In part c you're asked what would happen if the area were reduced more than necessary to reach Mach 1? If you actually did this, if you reduced the cross-sectional area to an extremely small "pin hole" size, what would the Mach number be through the "pin hole"?
3.5 An airflow at Mach 0.6 passes through a channel with a cross-sectional area of 50 cm?. The static pressure in the airstream is 50 kPa; the static temperature is 298 K. (a) Calculate the mass-flow rate through the channel. (b) What percent of reduction in area would be necessary to increase the flow Mach number to 0.8? to 1.0? (c) What would happen if the area were reduced more than necessary to reach Mach 1?
Transcribed Image Text:3.5 An airflow at Mach 0.6 passes through a channel with a cross-sectional area of 50 cm?. The static pressure in the airstream is 50 kPa; the static temperature is 298 K. (a) Calculate the mass-flow rate through the channel. (b) What percent of reduction in area would be necessary to increase the flow Mach number to 0.8? to 1.0? (c) What would happen if the area were reduced more than necessary to reach Mach 1?
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