Topic
Nozzle
About: Nozzle is a research topic. Over the lifetime, 158675 publications have been published within this topic receiving 893026 citations. The topic is also known as: spout.
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TL;DR: In this paper, the feasibility of a rocket motor utilizing a detonation wave rotating in an annular combustion chamber was considered, analytically and experimentally, and the results indicated that such a motor is feasible and therefore worth consideration in view of the possible advantages mentioned in the introduction.
Abstract: This paper considers, analytically and experimentally, the feasibility of a rocket motor utilizing a detonation wave rotating in an annular combustion chamber wherein the propel- lants are introduced continuously through the injectors and expelled through an annular nozzle. Experiments utilizing gaseous hydrogen and oxygen and gaseous methane and oxygen were conducted in a small-scale annular rocket motor. A breakable diaphragm extending across the annular chamber and a baffle plate extending outside the chamber were required to achieve a single detonation wave propagating in one tangential direction. A single Chap- man-Jouguet wave was realized successfully for the first cycle but subsequent cycles of the wave were not obtained. It is believed that the injector pattern with the consequent high turbulence level, premature burning, and limited mass flow characteristic was a major part of the difficulty. The analyses conducted indicated that such a motor is feasible and therefore worth consideration in view of the possible advantages mentioned in the introduction. How- ever, the primary need at this point is for experimental measurements under actual operating conditions. The findings of this study also are discussed in the light of possible application to conventional rocket motor combustion instability.
175 citations
Patent•
15 Apr 1987
TL;DR: In this article, a laser spray nozzle assembly includes a nozzle body with first and second spaced apart end portions, and a beam passageway extends between the end portions and permits a laser beam to pass therethrough.
Abstract: A laser spray nozzle assembly includes a nozzle body with first and second spaced apart end portions. A beam passageway extends between the end portions and permits a laser beam to pass therethrough. A housing surrounds the second end portion. The housing is spaced from the second end portion and forms an annular passage. The housing has an opening coaxial with the beam passageway for permitting the laser beam to pass therethrough. A cladding powder supply system is operably associated with the passage for supplying cladding powder thereto so that the powder exits the opening coaxial with the beam.
175 citations
TL;DR: In this article, it has been shown that, by passing the particle-laden gas through a single nozzle to vacuum, particle beams can be produced by supersonic expansion of a particleladen gas.
Abstract: Particle beams have traditionally been produced by supersonic expansion of a particle-laden gas through a single nozzle to vacuum However, it has been shown that, by passing the particle-laden gas
173 citations
173 citations
TL;DR: In this article, an experimental study of real multi-hole Diesel nozzles is performed under current DI Diesel engines operating conditions. The aim of the investigation is to study the influence of orifice geometry on the flow at the nozzle exit and to analyse its effect on the spray in evaporative conditions.
172 citations