Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
An Experimental Investigation Of New Concepts In Ejector Thrust Augmentation For V Stol
Download An Experimental Investigation Of New Concepts In Ejector Thrust Augmentation For V Stol full books in PDF, epub, and Kindle. Read online An Experimental Investigation Of New Concepts In Ejector Thrust Augmentation For V Stol ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis An Experimental Investigation of New Concepts in Ejector Thrust Augmentation for V/stol by : Morton Alperin
Download or read book An Experimental Investigation of New Concepts in Ejector Thrust Augmentation for V/stol written by Morton Alperin and published by . This book was released on 1969 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic concept involved in the investigation is the utilization of the Coanda effect in combination with an external cascade of airfoils. That combination served to achieve a more efficient rotation and amplification of the jet thrust vector as a result of both the large induced mass flow from the environment and the simultaneous high lift of the cascaded airfoils. The program objective was to establish optimal performance by systematic variation of the pertinent parameters. Experimental results showed a gain of 20% in augmented thrust compared to that of a simple Coanda cylinder. Since the observed mass flow through the airfoil cascade was small, in-house tests were performed with diffusion. The resultant increase in secondary mass flow produced a gain of 65% in thrust augmentation over the tests without diffusion despite large regions of flow separation in the diffuser. It appears highly probable that further large gains can result from precise diffuser design and boundary layer control in the diffuser. (Author).
Book Synopsis An Experimental Investigation of Ejector Thrust Augmentation by : Alton Alfred Eichelkraut
Download or read book An Experimental Investigation of Ejector Thrust Augmentation written by Alton Alfred Eichelkraut and published by . This book was released on 1960 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Ejector Thrust Augmentation by : Alton Alfred Eichelkraut (CAPT, USAF.)
Download or read book An Experimental Investigation of Ejector Thrust Augmentation written by Alton Alfred Eichelkraut (CAPT, USAF.) and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of a Thrust Augmenting Ejector by : Hidayat Wiradimadja
Download or read book Experimental Investigation of a Thrust Augmenting Ejector written by Hidayat Wiradimadja and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ejector is basically a jet pump in which the kinetic energy of the jet is made to impart motion to the fluid surrounding it. During this process, in a well design system, the ejector as a whole experiences a thrust much higher than that of the jet alone. In principle, an ejector is nothing but a jet surrounded by a shroud. This investigation concerns the performance of a two- dimensional ejector with its primary jet excited by a novel method. A constant area duct was used in this experiment. The velocity of the jet at the exit was subsonic. Maximum thrust was obtained when the ejector to jet exit area ratio was about 35. Under this condition a thrust augmentation ratio of 1.65 was achieved, with the jet excited at 20 Hz, whereas without excitation it was only 1.40. The mixing characteristics of the jet under excitation was examined using flow visualization techniques. Smoke filaments illuminated by a sheet of powerful light and schlieren optics with the jet heated were used. Excitation of the jet was found to generate large vortex-like flow structures which might be responsible for enhanced mixing. These vortices extended to considerable distances on both sides of the jet.
Book Synopsis ARL TR. by : Aerospace Research Laboratories (U.S.)
Download or read book ARL TR. written by Aerospace Research Laboratories (U.S.) and published by . This book was released on 1973 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis V/STOL Employing ARL Thrust Augmentation Concepts - Research Test Vehicle Configuration Summary and Design Technology Report by : C. Henderson
Download or read book V/STOL Employing ARL Thrust Augmentation Concepts - Research Test Vehicle Configuration Summary and Design Technology Report written by C. Henderson and published by . This book was released on 1968 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a detailed preliminary design study of a V/STOL research test vehicle (RTV), employing ARL thrust augmentation concepts, are presented. The V/STOL research airplane uses a high by-pass ratio turbofan engine with ejector thrust augmentation in the wing and fuselage nose. Design layouts of all major configuration components and systems are presented together with results of analytical investigations and trade-off studies.
Book Synopsis Experimental Investigation of Thrust Augmenting Ejector Flows by : L. Bernal
Download or read book Experimental Investigation of Thrust Augmenting Ejector Flows written by L. Bernal and published by . This book was released on 1982 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of two investigations, one recently completed on pulsatile ejector flows and the second currently in progress on a two-dimensional ejector configuration are presented. The objective of these investigations is to determine the role of entrained fluid and its mixing with the primary jet on ejector performance. Results will also be presented on the effects of entrance geometry on ejector entrainment and thrust augmentation.
Book Synopsis An Experimental Investigation of a Circular Thrust Augmenting Ejector by : Generoso C. Uhuad
Download or read book An Experimental Investigation of a Circular Thrust Augmenting Ejector written by Generoso C. Uhuad and published by . This book was released on 1985 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 4.4 in diameter circular ejector was tested to determine the effect on thrust augmentation ratio of the primary nozzle height and injection angle. Also tested were the effects of alternating primary nozzle injection angles, diffuser blowing and suction, inlet cross flow and low primary nozzle exit velocities on thrust augmentation. The results showed that both the primary nozzle injection angle and height affect the maximum thrust augmentation ratio attainable. A small amount of cross flow at the inlet increased the maximum thrust augmentation. The alternating primary nozzle injection angle arrangement did not increase the maximum thrust augmentation above that which was obtained using uniform primary nozzle injection angles. Diffuser blowing or suction did not provide an improvement in the maximum thrust augmentation above that which was obtained without diffuser boundary layer control. Finally, at low primary nozzle exit velocities, thrust augmentation increase as the nozzles were moved out along the inlet surface. The increase in thrust augmentation is attributed to the ability of the flow to remain attached to the inlet surface at low primary nozzle exit velocities thereby increasing the ejector effective mixing chamber length. (Author).
Book Synopsis Thrust Augmentation for V/stol: Arl's Research and Concepts by : William S. Campbell
Download or read book Thrust Augmentation for V/stol: Arl's Research and Concepts written by William S. Campbell and published by . This book was released on 1967 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals with the Aerospace Research Laboratories' (ARL) efforts in achieving thrust augmentation for air-breathing propulsion systems. Qualitative and quantitative analyses of the thrust augmentation process are reported and compared with experimental results. Application of the process to V/STOL propulsion is also discussed.
Book Synopsis Experimental Investigation of High Performance, Short, Thrust Augmenting Ejectors by :
Download or read book Experimental Investigation of High Performance, Short, Thrust Augmenting Ejectors written by and published by . This book was released on 1983 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an experimental investigation concerning the design and testing of air-to-air thrust augmenting ejectors utilizing short curved-wall diffusers are presented. These ejectors were designed primarily according to the procedure established in an analytical research effort sponsored by DTNSRDC from 1980-1981. Two of the three ejectors tested have identical mixing chambers. The mixing chamber inlet area to the primary nozzle area ratio lambda was 40. The overall ejector length-to-mixing chamber diameter ratios L/D(overall) were 6.09 and 6.16; diffuser area ratios AR(diff) were 1.33 and 1.46, respectively. The third ejector had an L/D(overall) of 6.02, a lambda of 20 and an AR(diff) of 1. 26. The best observed thrust augmentation ratio phi and the modified thrust augmentation ratio phi sub 2 were 2.11 and 1.91 respectively for a sonic primary jet. The modified thrust augmentation ratio phi sub 2 accounts for the penalty of suction in preventing flow separation in the diffuser. These levels of thrust ratio were derived from velocity measurements at the ejector exit. Independent thrust measurements obtained with strain gages on the mixing chamber agree with the force calculated from the momentum data. The experimentally observed ejector performance data correlated well with the predicted values. (Author).
Book Synopsis A Collection of Technical Papers by :
Download or read book A Collection of Technical Papers written by and published by . This book was released on 1971 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Two-Dimensional Thrust Augmenting Ejectors by : L. Bernal
Download or read book An Experimental Investigation of Two-Dimensional Thrust Augmenting Ejectors written by L. Bernal and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were performed with subsonic and underexpanded choked two-dimensional primary nozzle ejector flow systems without diffusion to evaluate the role of entrainment and mixing in thrust augmentation. Two-component Laser Doppler velocity measurements (mean and fluctuating values), thrust measurements, ejector shroud surface pressure measurements and flow visualization were used to determine the evolution of the velocity profiles and their relationship to the ejector performance. Key findings include: (1) Primary jet growth is significantly altered by the ejector shroud. (2) Primary jet turbulent characteristics when normalized with the local mean centerline velocity are in agreement with those for the free-jet. (3) In the neighborhood of the ejector shroud the flow field can be classified into two regions--the potential flow region and the region close to the ejector exit which is dominated by the turbulent transport. (4) Pressure recovery is very sharp in the first region and is more gradual in the region close to the ejector exit. The investigation is continuing toward the near-term objectives of obtaining measurements within diffused flow and with heated primary air. This volume emphasizes the laser doppler velocimetry developed especially for this program. Part II (AD-A154 083) presents detailed cold flow measurements along with preliminary primary hot flow data.
Book Synopsis An Experimental Investigation of Flow Mixing on Thrust Ejection Efficiency by : Donald J Morfitt (Jr)
Download or read book An Experimental Investigation of Flow Mixing on Thrust Ejection Efficiency written by Donald J Morfitt (Jr) and published by . This book was released on 1988 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine the effect flow mixing has on the thrust augmentation of an ejector. The experimental studies were divided into four phases. The four phases were baseline verification, a nozzle tip inclination study, a primary flow pulsing study, and a study of the quality of the ejector. The baseline verification study showed thrust augmentation is dependent upon the injection angle and height of the primary nozzles. The nozzle tip inclination study investigated the effects of having the tips inclined from the inlet surface of the ejector. The nozzle tips were inclined in four different configurations. The different configurations established a baseline or attempted to promote flow mixing and swirling. Theses. (mjm).
Book Synopsis Workshop on Thrust Augmenting Ejectors by :
Download or read book Workshop on Thrust Augmenting Ejectors written by and published by . This book was released on 1979 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis V/STOL Employing ARL Thrust Augmentation Concepts by : C. Henderson
Download or read book V/STOL Employing ARL Thrust Augmentation Concepts written by C. Henderson and published by . This book was released on 1968 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of ARL thrust augmentation concepts to a V/STOL transport and a tactical aircraft has been investigated. The augmentor system utilizes the exhaust of turbofan engines to power the ejector. Interim results are presented.
Book Synopsis Parametric Investigation of Thrust Augmentation by Ejectors on a Pulsed Detonation Tube by : Jack Wilson
Download or read book Parametric Investigation of Thrust Augmentation by Ejectors on a Pulsed Detonation Tube written by Jack Wilson and published by BiblioGov. This book was released on 2013-08 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A parametric investigation has been made of thrust augmentation of a 1 in. diameter pulsed detonation tube by ejectors. A set of ejectors was used which permitted variation of the ejector length, diameter, and nose radius, according to a statistical design of experiment scheme. The maximum augmentation ratios for each ejector were fitted using a polynomial response surface, from which the optimum ratios of ejector diameter to detonation tube diameter, and ejector length and nose radius to ejector diameter, were found. Thrust augmentation ratios above a factor of 2 were measured. In these tests, the pulsed detonation device was run on approximately stoichiometric air-hydrogen mixtures, at a frequency of 20 Hz. Later measurements at a frequency of 40 Hz gave lower values of thrust augmentation. Measurements of thrust augmentation as a function of ejector entrance to detonation tube exit distance showed two maxima, one with the ejector entrance upstream, and one downstream, of the detonation tube exit. A thrust augmentation of 2.5 was observed using a tapered ejector.
