Are you interested in purchasing the entire website? If so, we will include an additional premium domain (freetimelearn.com) at no extra cost along with this domain.
Mail : freetimelearn@gmail.com
WhatsApp : +919966463846
Correct Answer : Communication blackout
Explanation : At certain altitude and Mach number in hypersonic flow, the vehicles are unable to communicate by transmitting or receiving radio waves. This is due to the high temperature flow causing ionization of the chemically reactive flow which produces free electrons that absorb these radio waves. This is known as ‘communication blackout’.
Correct Answer : Option (C) : Hypersonic flow over slender bodies
Explanation : Hypersonic similarity parameter K is an important governing parameter in order to study the hypersonic flow i.e. flow with Mach number greater than 5 over slender bodies. It is given by the product of free stream Mach number and flow deflection angle.
Correct Answer : Option (D) : Product of Mach number and slenderness ratio
Explaination : The product of Mach number and slenderness ratio along with gamma are the two parameters which appear in the non – dimensional equations. For a body that has same shape but have different scale ratio, if these parameters are same, the flow over them at hypersonic regime remain same. This is the physical meaning of the hypersonic similarity parameter.
K
γ
Correct Answer : Option (A) : Hypersonic similarity parameter K and γ
