The external irreversible losses of air engines, due to equilibration of the hot and fast exhaust with the environment, are discussed based on the second law of thermodynamics. The effect of the bypass ratio on thermomechanical exergy destruction in the exhaust stream is demonstrated. The analysis gives a strong motivation for the use of high bypass turbo fan engines in modern aircraft.

We present finite-element analyzes and experimental results to validate our approach for building high-power single-mode Nd:YAG lasers. We show that the thermooptical and thermomechanical properties of a slab laser can be controlled. This is essential for the use of the proposed unstable resonator. We include demonstration of an efficient subscale laser operating at 20 W TEMoo.

The thermomechanical behavior of a material is expressed mathematically by means of one or more constitutive equations representing the response of the body to the history of its deformation and temperature. These settings induce a set of connections which can express local properties. We replace two of them by a second order connection and prove that the holonomity of this connection classifie...

The effect of thermomechanical treatment, based on combination isothermal cryorolling at liquid nitrogen temperature to strains ranging from 30 90 % and subsequent single electric pulsing with an integral current density Kj up 1.6 ×104 A2 s / mm4, the structure hardness initially coarse-grained pure nickel was studied. It is shown that considered treatment quite a powerful method control Ni str...