Supersonic Phenomena

Macroscopic non-equilibrium thermodynamics in dynamic calorimetry

“…This effect is explained by the existence of a complex heat capacity for which the imaginary part, linked to the absorption, reflects a problem of energy transfer between internal and external degrees of freedom. In an interesting review on "Supersonic Phenomena" written by Richards in 1939, the notion of frequency dependent heat capacity is also treated [95]. In this article, the distinction between low frequency heat capacity, C 0 , and high frequencies heat capacity, ∞ C is already made.…”

Unsteady One-Dimensional Flows with Heat Addition or Entropy Gradients

“…If the passage of the sound wave in itself causes heat addition, so that the compressions and expansions of the sound wave are nonadiabatic, then a is not exactly the velocity of sound. 3 Riemann; 4 ' 5 because of heat addition and area change, therefore, a single progressive wave will be continually transmitted and reflected as it passes down the tube, and, of course, its reflections will in turn be transmitted and reflected. For steady flow, the equations can be reduced to those of Chambre and Lin.…”

“…quantities including u f a, and S are known at the I points 1 and 2 in the x-t plane and that the values of > these quantities are to be found at a third point desig-3 nated 3. The rate of heat release is also assumed known 3 throughout the x-t plane, or 5 ' ^ <2* = £*(*,*)…”

Publication/Subscription/Member Data

“…K 4 --0.800000Z7 3 -0.316614UA n 2 ~ 0.00982009UA Z1 2 -0.000742200UA bl 2 + 3.14921 UA U A 1Z -0.119789 £74 n4 3 i + 0.551112 Z74ii4 3 3 -2.79450CM 11^15 -0.0467426UA n A bl + 0.481269 UA lz A zl + 7.63967^i3^1i5 + 0.163629 £74 i 3 …”