Results 271 to 280 of about 1,274,911 (296)

Compressor Off-Design Operation

2004
This chapter contains a methodical description and comparison of the five regulation modes: variable speed, suction throttling, adjustable inlet guide vanes, adjustable diffuser vanes and cooled bypassing. Two more topics are discussed. First, there is the test deducted dimensionless performance curve, showing work input factor versus exit flow ...
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Off-design performance of hypersonic waveriders

Journal of Aircraft, 1990
Waveriders are being considered more and more as potential aerospace vehicles. There are several questions, however, regarding these configurations that must be answered before they can be considered viable designs. The most significant problems are related to aerothermal heating, propulsion integration, and off-design performance.
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Turbine Aerodynamic Design and Off-Design Performance

2005
The turbine component is the power generator in a gas turbine system. As briefly discussed in Chapter 12, within a turbine component, an exchange of mechanical energy (shaft work) with the surroundings takes place. In contrast to compressors, the total energy of the working medium is partially converted into shaft work, thus supplying necessary power ...
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Off-design performance prediction for diffuser pumps

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2001
This paper presents a numerical methodology developed for predicting off-design performance of diffuser pumps. In off-design conditions, the effects of rotor/stator interaction and the pump system characteristics become significant, and both need to be taken into account.
J Sun, H Tsukamoto
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Conceptual Level Off-Design Scramjet Performance Modeling

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2007
A scramjet powered hypersonic cruise vehicle is primarily designed around a specific cruise point but will encounter a range of off-design flight conditions during acceleration, cruise-climb, descent. This paper presents a procedure for estimating the off-design performance of a simple scramjet engine.
Barry Hellman, Alicia Hartong
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Exhaust Diffuser Characteristics at Off-Design Conditions

Volume 2C: Turbomachinery, 2014
In todays electricity market with a strong mix of renewables and traditional energy sources, heavy-duty gas turbines often have to operate at part load with decreased exhaust mass flow. Decreased mass flow leads to reduced Mach number and this factor drives the exhaust loss down.
Vladimir Vassiliev, Thomas P. Sommer, Andrei Granovsky, Sergey Prozorov   +3 more
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TRADE-OFF DESIGN OF TOTAL HIP PROSTHESIS

Biomedical Engineering: Applications, Basis and Communications, 2005
Total hip arthroplasty is a common surgery for diseased hip joint in recent years. Although the operation receives good success, failure factors of the total hip prosthesis, however, include infection, dislocation, stem fracture and loosening. Concentrating on Sigma Medical Supplies Corporation total hip prosthesis, we use ANSYS finite element method ...
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Scramjet Optimization for Maximum Off-Design Performance

40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2004
Aspects relating to the design, analysis, and optimization of scramjet engines for peak on and off-design performance are explored in this paper. Tip-to-tail flowpaths are developed and compared using both fixed and variable geometry combustors to assess their off-design penalties for Mach 8 and Mach 10 design points.
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Off-Design Performance of a Single-Stage Transonic Turbine

Journal of Turbomachinery, 1998
This paper presents results of rig testing of a transonic, single-stage turbine at off-design conditions. Mapping of the 3.4 pressure ratio, 1.9 stage loading turbine ranged from 70 through 120 percent of design speed and 75 to 125 percent of design pressure ratio.
M. Woinowsky-Krieger, J.-P. Lavoie, E. P. Vlasic, S. H. Moustapha   +3 more
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Off-Design Performance Analysis of Ducted Propellers

SNAME Propellers '78 Symposium, 1978
The paper presents an outline of a new theoretical method for the calculation of the off-design performance characteristics of ducted propellers. The model for the duct performance calculation is an advanced non-linear model based on surface vorticity distribution techniques.
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