An air tank of volume 1.5 m3 is initially at 800 kPa and20 °C. At t = 0, it begins exhausting through a convergingnozzle to sea-level conditions. The throat area is 0.75 cm2.Estimate (a) the initial mass flow in kg/s, (b) the timerequired to blow down to 500 kPa, and (c) the time atwhich the nozzle ceases being choked.

Answered: An air tank of volume 1.5 m3 is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An air tank of volume 1.5 m³ is initially at 800 kPa and
20 °C. At t = 0, it begins exhausting through a converging
nozzle to sea-level conditions. The throat area is 0.75 cm².
Estimate (a) the initial mass flow in kg/s, (b) the time
required to blow down to 500 kPa, and (c) the time at
which the nozzle ceases being choked.

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