Please circle one correct answer for each of the following multiple choice quest
ID: 2996542 • Letter: P
Question
Please circle one correct answer for each of the following multiple choice questions. Pressure disturbances travel in the air at the speed of pressure wave the speed of transient air velocity the speed depending on the speed of any valve closure the speed of sound which is a constant value the speed of sound which depends on temperature and gas composition a speed as a function of all the factors listed in A to D above In compressible flows, static temperature is meant by: the temperature that stay constant at all time the temperature measured when the fluid velocity is zero the temperature measured by a thermometer moving with the flowing fluid the temperature measured by a thermometer under a constant hydrostatic pressure the temperature attained if fluid flow is decelerated to zero velocity In a sentence describe what you understand by "Normal Shock Waves." A jet plane is flying at 990 m/s in an (k = 1.4. Rair=287 J/kg K) at -15 degreeC. Find the temperature on the nose cone.Explanation / Answer
A shock wave is a compressional force that is created by an abrupt change in fluid properties such as pressure, temperature, and density. Shockwaves can be established in two types of flows: subsonic and supersonic. The subsonic flow is adjusted by changes in the flow properties while the supersonic flow is the adjusted through the change of the presence of an object
Stationary normal shock waves
A stationary normal shock wave is classified as going in the normal direction of the flow direction. For example, when a piston moves at a constant rate inside a tube, sound waves that travel down the tube are produced. As the piston continues to move, the wave begins to come together and compresses the gas inside the tube. The various calculations that come alongside of normal shock waves can vary due to the size of the tubes in which they are contained. Abnormalities such as converging-diverging nozzles and tubes with changing areas can affect such calculations as volume, pressure, and Mach number
Moving normal shock waves
Unlike stationary normal shockwaves, moving normal shockwaves are more commonly available in physical situations. For example, a blunt object entering into the atmosphere faces a shock that comes through the medium of a non-moving gas. The fundamental problem that comes through moving normal shockwaves is the moment of a normal shockwave through motionless gas. The viewpoint of the moving shockwaves characterizes it as a moving or non-moving shock wave. The example of an object entering into the atmosphere depicts an object traveling in the opposite direction of the shockwave resulting in a moving shockwave, but if the object was launching into space, riding on top of the shockwave, it would appear to be a stationary shockwave. The relations and comparisons along with speed and shock ratios of moving and stationary shockwaves can be calculated through extensive formulas.