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Correct Answer : Azimuth angle
Explanation : Shock wave angle is the angle formed between the shock wave and the axis of the conical surface. This angle is a function of azimuth angle ? and varies for every different meridian plane. Streamlines that move through various points on the shock wave undergo various changes in entropy around the shock since the shock wave angle of the shock wave is different.
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Correct Answer : Option (B) : 2
Explanation : For axisymmetric flow (flow over a cone at zero angle of attack), the flow field is only dependent on polar angle whereas when the cone is kept at some angle of attack, the flow field is a function of both polar angle θ and the azimuth angle φ.
θ
φ
Correct Answer : Option (C) : Three – dimensional
Explanation : When the right – circular cone is kept at a zero angle of attack to the free – stream, it is known to be axisymmetric and is known to be a two – dimensional flow. But, when it is kept at an angle of attack, the flow no longer remains two – dimensional. The shock wave more or less remains the same but the flow becomes three – dimensional.
Correct Answer : Option (D) : Polar angle
Explanation : When a right – circular cone is kept at a zero angle of attack in a supersonic flow, the flow properties are only a function of polar angle θ. It is independent of the azimuth angle φ and the distance from the vertex along conical ray.
