What is the In-Flight Temperature of Concorde's Skin?

  • Thread starter Thread starter azn_enigma
  • Start date Start date
  • Tags Tags
    Stuck
AI Thread Summary
The Concorde's skin temperature during flight is significantly affected by air friction, causing it to expand by 25.0 cm. The aircraft's length is 61.2 m at a ground temperature of 16.0 °C. Using the coefficient of linear expansion for aluminum (alpha = 2.40×10−5 /°C), the temperature of the skin can be calculated. One participant estimated the skin temperature to be 186.2 °C but expressed uncertainty about the accuracy. The discussion revolves around applying the linear expansion formula to determine the correct in-flight temperature.
azn_enigma
Messages
2
Reaction score
0
~~~Now I'm Really Stuck~~~

The supersonic aircraft Concorde has a length of 61.2 m when sitting on the ground on a typical day when the temperature is 16.0 °C. The Concorde is primarily made of aluminum. In flight at twice the speed of sound, friction with the air warms the Concorde's skin and causes the aircraft to lengthen by 25.0 cm. (The passenger cabin is on rollers, so the airplane expands around the passenger cabin.)

Take the coefficient of linear expansion for aluminum to be alpha = 2.40×10−5 /°C

What is the temperature T of the Concorde's skin in flight?


i got 186.2 :frown:


not sure though :s
 
Engineering news on Phys.org
If you followed the expression l = l_{0}(1+ k \Delta t), where \Delta t = t - t_{0}, and k is your coefficient of linear expansion, then it should be correct.
 
Last edited:

Thread 'Query on Isentropic relationships (such as PV^gamma = constant)'

Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
View full post »

Thread 'Dry sump pump issue'

I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
View full post »

Hot Threads

Recent Insights

Back
Top