The article deals with the problem of using secondary energy resources in system transportation and distribution natural gas, possibility generating electricity without burning fuel by reducing high-pressure gas at stations. analysis influence temperature entrance to expander - generator unit, as well dependence power unit on low-potential source is presented. Optimal temperatures are obtained ...

[1] Explosive volcanic eruption columns are generally subdivided into a gas-thrust region and a convection-dominated plume. Where vents have greater than atmospheric pressure, the gas-thrust region is overpressured and develops a jet-like structure of standing shock waves. Using a pseudogas approximation for a mixture of tephra and gas, we numerically simulate the effects of shock waves on the ...

Sonic boom reduction has been an urgent need to develop the future supersonic transport, because of heavy damages noise pollution. This paper provides active control method for aircraft reduce sonic boom, wherein a suction slot near leading edge and injection trailing on airfoil surface are opened, mass flow sucked in is equal injected edge. The diamond 566 airfoils adopted as baseline verify c...

Hydrogen is widely regarded as a key element of prospective energy solutions for alleviating environmental emission problems. However, hydrogen classified high-risk gas because its wide explosive range, high overpressure, low ignition energy, and fast flame propagation speed compared with those hydrocarbon-based gases. In addition, deflagration can develop into detonation in ventilation or expl...