Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 524
Book Description
Workshop on Thrust Augmenting Ejectors
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 524
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 524
Book Description
Static Thrust Augmentation of a Rocket-ejector System with a Heated Supersonic Primary Jet
Author: Albert J. Simonson
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 32
Book Description
"An investigation was conducted in order to evaluate the static thrust augmentation attainable through the use of a rocket-ejector system with a heated supersonic primary jet. This system consisted of a cylindrical mixing tube in conjunction with a supersonic nozzle having an expansion ratio of 15 to 1. A hydrogen peroxide gas generator was used to provide heated nozzle flow. An ejector with a bellmouthed inlet provided thrust augmentation up to about 18 percent of the primary rocket thrust, whereas the use of a blunt-lip inlet with elliptical profile provided augmentation up to 9 percent. Axial withdrawal of the rocket nozzle from the ejector provided small gains in thrust augmentation."--P.[1]
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 32
Book Description
"An investigation was conducted in order to evaluate the static thrust augmentation attainable through the use of a rocket-ejector system with a heated supersonic primary jet. This system consisted of a cylindrical mixing tube in conjunction with a supersonic nozzle having an expansion ratio of 15 to 1. A hydrogen peroxide gas generator was used to provide heated nozzle flow. An ejector with a bellmouthed inlet provided thrust augmentation up to about 18 percent of the primary rocket thrust, whereas the use of a blunt-lip inlet with elliptical profile provided augmentation up to 9 percent. Axial withdrawal of the rocket nozzle from the ejector provided small gains in thrust augmentation."--P.[1]
An Experimental Study of a Three-dimensional Thrust Augmenting Ejector Using Laser Doppler Velocimetry
Author: Bruce Lowell Storms
Publisher:
ISBN:
Category : Ejector pumps
Languages : en
Pages : 140
Book Description
Publisher:
ISBN:
Category : Ejector pumps
Languages : en
Pages : 140
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 964
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 964
Book Description
Recent Research Accomplishments of the Air Force Office of Scientific Research
Author: United States. Air Force. Office of Scientific Research
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 100
Book Description
Applicability of Thrust Augmenting Ejectors in a Supersonic Cruise Configuration
Author: Wendell S. Hertzelle
Publisher:
ISBN: 9781423568032
Category :
Languages : en
Pages : 92
Book Description
Thrust augmenting ejectors were analyzed by the author in an attempt to see if they could be used to provide a significant thrust increase over the baseline thrust of a primary core. This was done for the purpose of determining if leaving the ejectors open in the cruise configuration of the High Speed Civil Transport would lead to a thrust increase that would at least offset the weight of the ejectors themselves. If this was found to be true then the fuel economy of the HSCT might be improved by leaving them open and not closing them during cruise. In analyzing the ejectors, no assumptions were made regarding inlet nor outlet configurations, so an attempt was made to find the point of optimal thrust augmentation by varying secondary stream bypass Mach number and the amount of flow entrainment. Two solutions were found to each mixing scenario, one subsonic and the other supersonic. These two solutions were each analyzed and ones not satisfying the Second Law of Thermodynamics were eliminated. Analytic diffuser and bleed losses were also explored in the analysis of the ejector flow. Within the limitations of the assumptions discussed in this paper, appreciable thrust augmentations have been discovered over a large range of bypass Mach numbers and entrained mass flows. This lead the author to the conclusion that ejectors warrant further research beyond a first order analysis, and serious thought should be put into leaving them open in cruise.
Publisher:
ISBN: 9781423568032
Category :
Languages : en
Pages : 92
Book Description
Thrust augmenting ejectors were analyzed by the author in an attempt to see if they could be used to provide a significant thrust increase over the baseline thrust of a primary core. This was done for the purpose of determining if leaving the ejectors open in the cruise configuration of the High Speed Civil Transport would lead to a thrust increase that would at least offset the weight of the ejectors themselves. If this was found to be true then the fuel economy of the HSCT might be improved by leaving them open and not closing them during cruise. In analyzing the ejectors, no assumptions were made regarding inlet nor outlet configurations, so an attempt was made to find the point of optimal thrust augmentation by varying secondary stream bypass Mach number and the amount of flow entrainment. Two solutions were found to each mixing scenario, one subsonic and the other supersonic. These two solutions were each analyzed and ones not satisfying the Second Law of Thermodynamics were eliminated. Analytic diffuser and bleed losses were also explored in the analysis of the ejector flow. Within the limitations of the assumptions discussed in this paper, appreciable thrust augmentations have been discovered over a large range of bypass Mach numbers and entrained mass flows. This lead the author to the conclusion that ejectors warrant further research beyond a first order analysis, and serious thought should be put into leaving them open in cruise.
NASA Tech Briefs
Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 664
Book Description
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 664
Book Description
Prediction methods for jet V/STOL propulsion aerodynamics
Author: M. F. Platzer
Publisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 548
Book Description
Publisher:
ISBN:
Category : Short take-off and landing aircraft
Languages : en
Pages : 548
Book Description
A Simple Model of Pulsed Ejector Thrust Augmentation
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
V/STOL Concepts in the United States: Past, Present, and Future
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description