Aeronautical Enginnering > QUESTIONS & ANSWERS > FUNDAMENTALS OF AERODYNAMICS BY JOHN ANDERSON (6TH ED) Q&A 2023 UPDATE A+ (All)
FUNDAMENTALS OF AERODYNAMICS BY JOHN ANDERSON (6TH ED) Q&A 2023 UPDATE A+
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Define Rectilinear - ANS-Consisting of straight lines Define wave drag - ANS-Component of aerodynamic drag on every part of an aircraft due to the presence of shock waves Why do ICBM's have a blun ... t nose instead of an aerodynamically favorable pointy nose? - ANS-Although a slender nose would reduce wave drag, it creates more skin friction heating as air molecules are able to directly contact the tip of the missile as it travels at very high speeds (Mach 25). To reduce the amount of heat on the missile from air friction, a blunt nose design is implemented which creates a bow shockwave that consumes some of this frictional heating and transfers it into the air instead of onto the aerodynamic body. What is the critical Reynold's number? What is its value? - ANS-This describes the value at which flow transitions from a laminar flow regime to a turbulent flow regime. This number varies for certain aerodynamic shapes. [Show More]
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