nozzle guide vanes
- The stator blades of a turbine. They are convex and shaped like airfoils. They direct the airflow onto the turbine blades while at the same time converting pressure energy into kinetic energy. Gases coming from the combustion chamber pass through the nozzle guide vanes, where because of their convergent shape they accelerate. On passing through the NVGs, gases are given a “spin” or a “swirl” in the direction of the rotation of the turbine rotor blades. The latter absorb this energy, causing the turbine to rotate at a high speed.
Aviation dictionary. 2014.
Look at other dictionaries:
nozzle box — An assembly of nozzle guide vanes and surrounding walls of a gas duct. These vanes can be all or only those that fill a portion of the periphery … Aviation dictionary
Turbofan — [ CFM56 3 turbofan, lower half, side view.] A turbofan is a type of jet engine, similar to a turbojet. It essentially consists of a ducted fan with a smaller diameter turbojet engine mounted behind it that powers the fan. Part of the airstream… … Wikipedia
Turbine — A turbine is a rotary engine that extracts energy from a fluid flow. Claude Burdin (1788 1873) coined the term from the Latin turbo , or vortex, during an 1828 engineering competition. Benoit Fourneyron (1802 1867), a student of Claude Burdin,… … Wikipedia
Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is … Wikipedia
vane — i. A thin and more or less flat object intended to align itself with a stream or flow in a manner similar to that of the common weathercock, such as a device that projects ahead of an aircraft to sense gusts or other actions of the air to create… … Aviation dictionary
Gas turbine — Microturbine redirects here. For turbines in electricity, see Small wind turbine. For turbines driven by the flow of gas, see Turbine. A typical axial flow gas turbine turbojet, the J85, sectioned for display. Flow is left to right, multistage… … Wikipedia
Combustor — Flame stabilized by cyclone. A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, combustion chamber or flame holder. In a gas turbine engine, the combustor or … Wikipedia
reaction turbine — A type of turbine in which the stator vane and the rotor are arranged in such a way that the entire pressure drop takes place between the rotor blades, which have convergent passages in the direction of flow. The nozzle guide vanes only guide the … Aviation dictionary
Singapore Airlines subsidiaries — Singapore Airlines has over 50 subsidiaries and associates, including:IA Engineering Company LimitedSIA Engineering Company Limited (SGX: [http://info.sgx.com/serviceapp.nsf/Cpy/S59 S59] ) is a major provider of aircraft maintenance, repair and… … Wikipedia
turbine stages — A set of NGVs (nozzle guide vanes) followed by one set of rotor blades forms one stage of a turbine. Two stages of a turbine … Aviation dictionary