Question B2a) At a given instant of time, two pressure waves, each moving at the speed of sound, emitted by apoint source moving with a constant velocity in a fluid in at rest are shown in figure QB2.Determine the Mach number involved and indicate with a sketch the instantaneous location of thepoint source.R=5 cm12 cmFigure QB2R=24 cm[8 Marks]b) The gas velocity across a normal shock wave decreases from 480 m/s to 160 m/s. If the pressure anddensity upstream of the shock are 62 kPa and 1.5 kg/m ³, find the pressure and density downstreamof the shock and the specific heat ratio of the gas.c) An aircraft is in supersonic flight at 11 km altitude on a standard day. The true air speed of the planeis 695 m/s. Calculate the flight Mach number of the aircraft. A total head tube is attached to theplane is used to sense stagnation pressure which is converted to flight Mach number by an on-boardcomputer. However, the computer programme has ignored the normal shock wave that stands infront of the total head tube and assumed isentropic flow. Evaluate the pressure sensed by the totalhead tube. Determine the erroneous air speed calculated by the computer programme. Theatmospheric pressure and temperature at 11 km altitude are 0.23 bar and 216 K respectively.

Given:To find:(a) The mach number involved.(b) The instantaneous location of the point source.

At a given instant of time, two pressure waves, each moving at the speed of sound, emitted by a point source moving with a constant velocity in a fluid in at rest are shown in figure QB2. Determine the Mach number involved and indicate with a sketch the instantaneous location of the point source.

At a given instant of time, two pressure waves, each moving at the speed of sound, emitted by a point source moving with a constant velocity in a fluid in at rest are shown in figure QB2. Determine the Mach number involved and indicate with a sketch the instantaneous location of the point source.

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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