Topic
Turbofan
About: Turbofan is a research topic. Over the lifetime, 4114 publications have been published within this topic receiving 39490 citations. The topic is also known as: fanjet & turbofan engine.
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Patent•
20 Aug 1986
TL;DR: In this paper, a core engine, a fan assembly and a booster compressor are positioned upstream of the core engine and the booster compressor 42 is positioned downstream of the fan assembly, and a planet carrier 62 of the gear assembly 54 is connected, at its downstream end to a core casing 22 and a stator casing 45 of the booster compressors.
Abstract: A geared turbofan gas turbine engine comprises a core engine (12 Figure 1), a fan assembly 24 and a booster compressor 42. The fan assembly 24 is positioned upstream of the core engine and the booster compressor 42 is positioned upstream of the fan assembly 24. The fan assembly is driven by the turbines of the core engine via a gear assembly 54 and a rotor 44 of the booster compressor is driven by the turbines of the core engine. A planet carrier 62 of the gear assembly 54 is connected, at its downstream end to a core casing 22 of the core engine, at its upstream end to a stator casing 45 of the booster compressor 42.
12 citations
Patent•
23 Jul 2014
TL;DR: In this article, the authors proposed a method for building a covered wire inner full-state turbofan engine vehicle-mounted real-time model, which comprises the steps of firstly building a vehicle mounted realtime dynamic model, indicating an applied force-included and above-idle-speed state, then, building a starting simplified model of the turbopan engine, finally, utilizing a Kalman filter for estimating gas circuit performance characteristic parameters of the turbo-propagation engine, and building an application-based self-adaptation realtime model indicating the applied force
Abstract: The invention discloses a method for building a covered wire inner full-state turbofan engine vehicle-mounted real-time model. The method comprises the steps of firstly building a vehicle-mounted real-time dynamic model, indicating an applied force-included and above-idle-speed state, of a turbofan engine, then, building a starting simplified model of the turbofan engine, finally, utilizing a Kalman filter for estimating gas circuit performance characteristic parameters of the turbofan engine, and building a vehicle-mounted self-adaptation real-time model indicating the applied force-included and above-idle-speed state. The method can meet the requirement of a covered wire full-state general model of the turbofan engine for precision and vehicle-mounted real-time performance, the strong adaptive capacity for model mismatch caused by the engine individual difference and performance degradation is obtained, model foundation is provided for experimental verification of a modern control theory and a fault-tolerant control method, and the method plays a positive and promotion role in shortening the preparation time, reducing test risk and cost.
12 citations
01 Jun 2004
TL;DR: In this paper, a 10% axissymmetric scale model was used for wind tunnel tests to evaluate turbofan intake duct flow separation and the subsequent control of compressor face distortion with the potential to achieve a relaxation of the maximum cross wind constraint at take off.
Abstract: The control of turbofan intake duct flow separation and the subsequent control of compressor face distortion have the potential to achieve a relaxation of the maximum crosswind constraint at take off. Wind tunnel tests have been conducted using a 10% axissymmetric scale model. Air jets, simulating micro-electrical mechanical actuators, have been implemented at the intake lip to reenergize the boundary layer locally. Improvements in distortion of up to 40% could be achieved at a 10% engine bleed.
12 citations
Patent•
15 Sep 2005
TL;DR: In this article, the present invention is turbofan or turbojet assembly for vehicles, craft, aircraft and the like, which includes a plurality of gas turbines, mini-turbines, micro-Turbines or nanoturbines disposed in parallel.
Abstract: The present invention is turbofan or turbojet assembly for vehicles, craft, aircraft and the like. The assembly includes a plurality of gas turbines, mini-turbines, micro-turbines or nanoturbines disposed in parallel. The turbines form a gondola that is a large, single turbine.
12 citations
01 Jan 1979
TL;DR: In this article, a study of design concepts for the application of the properties of LH2 in a turbofan engine for air transport is presented, showing the benefits from the reduction of aircraft direct operating cost.
Abstract: A study of design concepts for the application of the properties of LH2 in a turbofan engine for air transport is presented The study showed the benefits from the reduction of aircraft direct operating cost Design concepts for the engine fuel delivery and control system, including the engine high pressure fuel pump, were developed and general concept feasibility was demonstrated Recommendations were made for the advanced development required for design application for both the engine, the fuel delivery, and the control system
12 citations