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Keywords: compressors
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Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052401.
Published Online: March 5, 2012
...Francesco Melino; Mirko Morini; Antonio Peretto; Michele Pinelli; Pier Ruggero Spina Gas turbine axial compressor performance is heavily influenced by blade fouling. As a result, the gas turbines efficiency and producible power output decrease. Performance degradation of an axial compressor stage...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052509.
Published Online: March 1, 2012
...Luis San Andrés; Adolfo Delgado Oil seals in centrifugal compressors reduce leakage of the process gas into the support bearings and ambient. Under certain operating conditions of speed and pressure, oil seals lock, becoming a source of hydrodynamic instability due to excessively large cross...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052503.
Published Online: February 23, 2012
... an eight-stage gas reinjection compressor is estimated for the four bearings, using a full KC representation, the KCM representation, and synchronously reduced bearing coefficients. The full KC representation gave the lowest estimate of stability margin, with up to 18% difference between full KC and...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2012, 134(4): 042503.
Published Online: January 27, 2012
... typical seal types used in process gas centrifugal compressors at the balance piston location or center seal location to limit internal leakage and ensure a robust rotordynamic design. Tests were conducted on 170.6 mm (6.716 in) diameter seals for rotor speeds up to 15 kprm, inlet air pressure of 6.9 bar...
Journal Articles
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. April 2012, 134(4): 044502.
Published Online: January 25, 2012
...Wei Xu; Tong Wang; Chuangang Gu; Liang Ding The holed casing treatment is a new type of casing treatment that has self-adaptability for a centrifugal compressor with unshrouded impeller. It was demonstrated experimentally and numerically that both the stall margin and the choked margin of the...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032402.
Published Online: January 9, 2012
...Alessandro Bianchini; Giovanni Ferrara; Lorenzo Ferrari; Valeria Ballarini; Lorenzo Bianchi; Libero Tapinassi; Lorenzo Toni A wide-ranging analysis was performed by GE Oil & Gas and the University of Florence to investigate the effects on the estimation of centrifugal compressor performance...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032505.
Published Online: January 4, 2012
...Naohiko Takahashi; Yohei Magara; Mitsuhiro Narita; Haruo Miura Since heavier gases exert larger effects on rotordynamic stability, stability evaluation is important in developing or designing high-pressure compressors. To evaluate the rotor stability during operation, an excitation test using a...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032506.
Published Online: January 4, 2012
... analysis with dynamic force coefficients derived from the analysis of the GFBs. The developed oil-free TC was designed using a hollow rotor with a radial turbine at one end and a compressor wheel at the other end, a center housing with journal and thrust GFBs, and turbine and compressor casings...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032401.
Published Online: January 3, 2012
...Rainer Kurz; Klaus Brun Fouling of compressor blades is an important mechanism leading to performance deterioration in gas turbines over time. Fouling is caused by the adherence of particles to airfoils and annulus surfaces. Particles that cause fouling are typically smaller than 2 to 10 microns...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032504.
Published Online: January 3, 2012
...Alexander Lange; Matthias Voigt; Konrad Vogeler; Henner Schrapp; Erik Johann; Volker Gümmer This paper introduces an approach for considering manufacturing variability leading to a nonaxisymmetric blading in the computational fluid dynamics simulation of a high-pressure compressor stage. A set of...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022504.
Published Online: December 20, 2011
... rotor modeled corresponds to an industrial compressor. Special emphasis is put on analyzing the stability map of the rotor when the different lubrication regimes are included into the TPJB modeling. Results show that, for the studied rotor, the inclusion of a THD model is more relevant when compared to...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022001.
Published Online: December 16, 2011
... coalescing and draining out (i.e., fogging efficiency), and (b) quantifying the amount of nonevaporated droplets that may reach the compressor bellmouth to ascertain the erosion risk for compressor airfoils if wet compression is to be avoided. When the silencer is installed, there is an additional...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2012, 134(1): 011603.
Published Online: November 7, 2011
...Yuan Liu; Manuj Dhingra; J. V. R. Prasad This paper presents a method for estimating compressor stall margin and the results of applying the estimation technique to an axial compressor rig. Stall margin estimation is accomplished through the use of a compressor stability detection parameter called...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2012, 134(1): 011602.
Published Online: November 4, 2011
... single as well as concurrent permanent faults in the engine. A set of nonlinear models of the jet engine in which compressor and turbine maps are used for performance calculations corresponding to various operating modes of the engine (namely, healthy and different fault modes) is obtained. Using the...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 121602.
Published Online: September 1, 2011
... enhance the isolation capability of the sparse estimator. In particular, the constraints help resolve a confusion issue between high pressure compressor and variable stator vanes faults. 08 04 2011 09 04 2011 01 09 2011 01 09 2011...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 122401.
Published Online: August 31, 2011
...K. K. Botros Nozzle type check valves are often employed in compressor stations in three locations: compressor outlet, station discharge, and station bypass. The fundamental design concept of these valves is based on creating a converging diverging flow through the valve internal geometry such that...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 122402.
Published Online: August 31, 2011
...K. K. Botros Compression systems are designed and operated in a manner to eliminate or minimize the potential for surge, which is a dynamic instability that is very detrimental to the integrity of the compressor unit. Compressor surge can occur when compressors are subjected to rapid transients...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 122501.
Published Online: August 26, 2011
.../0043-1648(70)90261-9 accelerometers ball bearings compressors fuel systems rotors turbines wheels turbocharger rotor dynamics ball bearings dynamic model experimental test rig Turbocharger test rig setup Rotor and bearing cross-section Introduction of...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 102001.
Published Online: May 4, 2011
...-term operational integrity of gas turbines should be evaluated carefully; in particular, wet compression may lead to the erosion of first compressor stages due to the impact of water droplets within the flow at compressor intake. This issue is still controversial in technical literature since only...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 092504.
Published Online: April 19, 2011
... York . Kheireddin , B. , 2009 , “ Investigation of the Friction Factor Behavior for Flat Plates of Smooth and Roughened Surfaces With Supply Pressure up to 84 bars ,” MS thesis, Department of Mechanical Engineering, Texas A&M University, College Station, TX. compressors flow...