Oblique-Shock
50 questions available
Questions
What component of the flow velocity remains constant across an oblique shock wave?
View answer and explanationFor a given upstream Mach number and deflection angle, the cubic equation for the shock angle (θ) can yield multiple solutions. What is the 'strong solution' characterized by?
View answer and explanationUnder what condition does a detached shock form in front of a wedge instead of an attached oblique shock?
View answer and explanationIn the cubic equation used to find the shock angle (x = sin squared theta), what is the physical meaning when the discriminant D is greater than 0?
View answer and explanationHow is the normal component of the upstream Mach number (M1n) related to the upstream Mach number (M1) and the shock angle (theta)?
View answer and explanationWhat is the primary conceptual difference in the analysis of supersonic flow over an infinite wedge versus a cone?
View answer and explanationWhat is a major practical application of designing with a series of weak oblique shocks, as described in the chapter?
View answer and explanationAccording to the stability analysis described in the appendix, why is a weak oblique shock considered stable?
View answer and explanationWhat does the Rankine-Hugoniot relation describe for an oblique shock?
View answer and explanationFor an upstream Mach number (Mx) of 2.0, what is the maximum possible deflection angle (delta_max) in degrees?
View answer and explanationWhat is the relationship between the deflection angle (delta) and the shock angle (theta) for very large upstream Mach numbers (M1 approaches infinity) and small angles?
View answer and explanationIn Example 14.2, air flows at Mach 4 towards a wedge with an angle of 20 degrees. What is the downstream Mach number for the weak shock solution (Myw)?
View answer and explanationAccording to the discussion on zero inclination, what prevents the continuous formation of Mach waves from a perfectly smooth, straight wall?
View answer and explanationIn the analysis of a detached shock around a round-tip bullet, what is the flow condition in Zone A, the region directly in front of the body's stagnation point?
View answer and explanationWhat is the pressure ratio (P2/P1) across an oblique shock if the upstream Mach number M1 is 3.0 and the shock angle theta is 30 degrees? Use k=1.4.
View answer and explanationIn the context of Mach reflection, as shown in Figure 14.13, what happens at the intersection of the two oblique shocks?
View answer and explanationIf air (k=1.4) at Mach 2.5 is deflected by a wedge, what is the Mach number of the flow downstream of the shock (My) if the deflection is the maximum possible?
View answer and explanationWhat does Prandtl's relation for an oblique shock connect?
View answer and explanationFor a given upstream Mach number M1, what is the theoretical minimum possible shock angle (theta)?
View answer and explanationIn Example 14.10, an incident shock from a 15-degree deflection at Mach 4 strikes a wall, creating a reflected shock. What is the Mach number upstream of this second (reflected) shock?
View answer and explanationWhy does the temperature change across an oblique shock even though the tangential velocity component U_t is constant?
View answer and explanationIf an oblique shock has a shock angle (theta) of 30 degrees and the deflection angle (delta) is 10.51 degrees, what is the upstream Mach number (M1) according to the data in Example 14.11?
View answer and explanationWhat is the key takeaway from Example 14.4, which compares a single normal shock at M=2.0 with a two-stage oblique shock system?
View answer and explanationAccording to the table of maximum values for oblique shock (k=1.4), what is the maximum shock angle (theta_max) for an upstream Mach number (Mx) of 1.4?
View answer and explanationWhat is the 'close view' of an oblique shock, as described in section 14.4.7?
View answer and explanationIf a supersonic flow at M=3.5 creates a detached shock in front of a wedge, what is the Mach number immediately behind the normal portion of the shock?
View answer and explanationAccording to the table of maximum values, as the upstream Mach number (Mx) increases from 1.1 to 10.0, what is the general trend of the maximum possible deflection angle (delta_max)?
View answer and explanationWhat is the explicit equation for the downstream Mach number squared (M2 squared) given M1 and the shock angle theta?
View answer and explanationFor a supersonic flow at M=2.88 and a Mach angle of 34 degrees, what is the deflection angle (delta) in degrees?
View answer and explanationIn Example 14.13, which describes a flow with two different deflection angles on opposing walls, what physical quantities must be equal across the resulting slip plane?
View answer and explanationWhat is the relationship for the density ratio (rho2/rho1) across an oblique shock?
View answer and explanationFor a very weak oblique shock, where the deflection angle delta is very small, the shock angle theta approaches what value?
View answer and explanationAccording to the analysis of a finite wedge in Section 14.4.5, where is the 2D oblique shock theory most accurate?
View answer and explanationIf a cone with a half-angle of 14.43 degrees in a supersonic flow creates a shock with an angle of 30.099 degrees, what was the upstream Mach number M1, based on the data in Example 14.3?
View answer and explanationFor a normal shock, the downstream flow is always subsonic. For an oblique shock, what can be said about the downstream flow?
View answer and explanationWhat is the temperature ratio (T2/T1) for an oblique shock with M1=2.88 and theta=34.0 degrees?
View answer and explanationWhy is the maximum deflection angle for a Prandtl-Meyer expansion wave much larger than for an oblique shock at the same high Mach number?
View answer and explanationGiven an upstream Mach number M1 and a shock angle theta, the deflection angle delta is:
View answer and explanationIn Example 14.2, when the wedge angle is 20 degrees and M1=4.0, what is the shock angle (theta_w) for the weak solution in degrees?
View answer and explanationFor a perfect gas with k=1.4, what is the total stagnation pressure ratio (P0y/P0x) for a normal shock at M=5.0?
View answer and explanationIf a flow at M=1.7498 turns through a weak oblique shock with a deflection of 7 degrees, what is the stagnation pressure ratio (P0y/P0x) from the data in Example 14.4?
View answer and explanationWhat does the deflection angle, delta, represent in the context of an oblique shock?
View answer and explanationWhen is the analysis for upstream Mach number M1 and deflection angle delta the most complicated?
View answer and explanationWhat is the static pressure ratio (Py/Px) after a normal shock for an upstream Mach number of 3.5?
View answer and explanationIn the cubic equation x^3 + a1*x^2 + a2*x + a3 = 0 for the shock angle, what does the variable x represent?
View answer and explanationWhy does the text state that the thermodynamically unstable root of the shock angle cubic equation is 'unrealistic' for steady-state analysis?
View answer and explanationBased on Example 14.9, what is the maximum static pressure ratio (Py/Px) that can be obtained across a WEAK oblique shock for M1=2.5?
View answer and explanationWhat happens to the total energy of the flow as it passes through an oblique shock wave?
View answer and explanationIf a flow has an upstream Mach number M1 of 5.0 and the shock angle theta is 30 degrees, what is the downstream Mach number for the weak solution (Myw) based on the data in Example 14.12?
View answer and explanationWhat is the primary reason that a normal shock is considered a 'special case' of an oblique shock?
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