outlet guide vane functionoutlet guide vane function

In the drawings as hereinafter described, a preferred embodiment is depicted; however, various other modifications and alternate constructions can be made thereto without departing from the spirit and scope of the invention. The authors would like to thank their colleagues Umesh Paliath, Trevor Wood, Kishore Ramakrishnan, Nikolai Pastouchenko, and Lawrence Cheung (GE Global Research); and Muni Majjigi and John Wojno (GE Aviation) for their fruitful discussions. An outlet guide vane for an axial compressor extending along a rotor axis, includes an airfoil extending in a span direction from a radially inner end at 0% height to a radially outer end at 0% height. Construction details are described which reduce losses in the end wall regions of the vanes, particularly for axial flow fans operating at low flow coefficient with strong localized swirl associated with upstream rotor tip clearance flows. Note: Type B vaneaxial guide vanes are designed specifically for use with the Type B propeller . The guide vanes are welded to both the inner cylinder and the fan housing interior and function to aid in the elimina-tion of swirl and turbulence downstream of the fan Found inside – Page 268In addition , the non zero radial velocities make the flow angle a between disks a function of the axial coordinate ... It is expected that guide vanes will improve the overall turbine efficiency provided that losses at the outlet guide ... 25, 2011, pp. This de-swirling generates a diffusing flow with growing boundary layers, LinkGoogle Scholar, [44] Hughes C. E., Jeracki R. J., Woodward R. P. and Miller C. J., “Fan Noise Source Diagnostic Test — Rotor Alone Aerodynamic Performance Results,” AIAA Paper  2002-2426, 2002. An example of impact pressure is the pressure exerted on one's hand held outside a moving car's window. 7. 1, 2007, pp. 6marks The stagnation pressure . Found inside – Page 430At the compressor inlet , the conditions are different because of the difference in function of the entrance guide vanes from that of the typical stator blades . The entrance guide vanes induce an initial whirl to the air in the ... a compressor surge avoidance priority mode in which a value of the first inlet guide vane opening or a value of the third inlet guide vane opening, whichever is lower, is selected, the selected lower value or a value of the second inlet guide vane opening, whichever is higher, is selected, and the selected higher value is set as the inlet guide vane opening command. Found inside – Page 419The purpose of the blading is to impart a directional change to air such that the outlet angle B2 is greater than Bi . ... 3.4.2.3 Outlet Guide Vanes- The use of outlet guide vanes performs a function similar to inlet guide vanes except ... The directional flow increases as the vanes close, putting less . 330, No. Inlet guide vane control device of gas turbine, Application filed by Mitsubishi Heavy Industries Ltd. Unsteady Simulations of a Fan/Outlet-Guide-Vane System: Tone-Noise Computation. 649–678. All other journal titles should work as expected. Google Scholar, [3] Clair V., Polacsek C., Garrec T. L. and Reboul G., “CAA Methodology to Simulate Turbulence-Airfoil Noise,” AIAA Paper  2012-2189, 2012. Guide Vanes (VP/VPBD Only) The fan housing is fitted with aerodynamically designed stationary straightening guide vanes on the air discharge side of the propeller. 6, 2010, pp. The present invention has been accomplished in light of the above-described circumstances. The outlet guide vanes "straighten" the air to provide the combustor with the proper airflow direction. doi:https://doi.org/10.1016/j.jsv.2004.03.062 JSVIAG 0022-460X CrossrefGoogle Scholar, [22] Grace S., Wixom A., Winkler J., Sondak D. and Logue M. M., “Fan Broadband Interaction Noise Modeling,” AIAA Paper  2012-2269, 2012. These design changes together with the material changes has a potential to decrease the weight up to 40 %, while at the same time decrease the number of details in the engine. The authors would also like to acknowledge Gary G. Podboy (NASA John H. Glenn Research Center) for providing the Source Diagnostic Test turbulence test data. Math. Hence, the emergency shutdown of the gas turbine due to an exhaust gas pressure rise (gas turbine back pressure rise) can be prevented more reliably to ensure the continued operation of the gas turbine (increased rate of operation). 11, No. 29–64. Google Scholar, [18] Posson H., Moreau S. and Roger M., “Fan-OGV Broadband Noise Prediction Using a Cascade Response,” AIAA Paper  2009-3150, 2009. doi:https://doi.org/10.2514/3.7675 AIAJAH 0001-1452 LinkGoogle Scholar, [38] Jurdic V., Moreau A., Joseph P., Enghardt L. and Coupland J., “A Comparison Between Measured and Predicted Fan Broadband Noise Due to Rotor-Stator Interaction,” AIAA Paper  2007-3692, 2007. An OGV is an outlet guide vane...usually on the outlet of the Fan Flow. LinkGoogle Scholar, [37] Martinez R. and Widnall S. E., “Unified Aerodynamic-Acoustic Theory for a Thin Rectangular Wing Encountering a Gust,” AIAA Journal, Vol. 19 terms. The "pre-swirled" air reduces the amount of work needed from the main driver to spin the air entering the impeller. 96 terms. guide vane inlet guide Prior art date . The stationary guide vanes are fixed on the guide mechanism. 4) Draft Tube. No. 281–287; JAIRAM 0021-8669 also NASA Rept. airfoil leading edge suction pressure. The whole flow field in the pump under different guide vane . In addition, the vanes may be leaned in the circumferential direction or swept axially to “de-phase” the interaction of the fan blade wakes with the guide vanes, resulting reduced noise level. . 4, Chinese Journal of Aeronautics, Vol. the heat transfer patterns and pressure profiles are weak functions of the Re and Ma. input parameters. F . 7 . The mechanism and some issues are first discussed using a two-dimensional gust-prediction model. 2,795,373 issued to Hewson et. Function Of these parts :-. ‡Leading Research Scientist; also New Technologies and Services, LLC, 195220 Saint Petersburg, Russia. In the preferred embodiment, the vane spanwise airfoil stacking line is approximately straight . Found inside – Page 1722... to said outlet function of the position of the inlet guide of said integral controller , and an outlet coupled to said flow regulating device ; ' 194 Patent col . 101.64 - col.12 1.16 ( emphases and added ) . ( g ) a guide vane ... 3721–3743. Google Scholar, [5] Ganz U. W., Joppa P. D., Patten T. J. and Scharpf D. F., “Boeing 18-Inch Fan Rig Broadband Noise Test,” NASA Rept. These guide vanes direct the air onto the compressor at the correct angle. Total pressure is the sum . Hence, makes the turbine more efficient. *Noise, Vibration and Emissions, P.O. These two functions put a lot of stress on OGVs, which are normally very thick . 3. 2003-206749. LinkGoogle Scholar, [13] Glegg S. A. L., “The Response of a Swept Blade Row to a Three-Dimensional Gust,” Journal of Sound and Vibration, Vol. Quasi-three-dimensional unsteady lift is calculated using a two-dimensional equivalence method. CR-2395, 1974. doi:https://doi.org/10.2514/3.59240 LinkGoogle Scholar, [12] Envia E., “A High Frequency Model of Cascade Noise,” AIAA Paper  1998-2318, 1998. PATENTED CASE, Free format text: Found insideThe basic purpose of the guide vanes or stay vanes is to convert a part of pressure energy of the fluid at its entrance ... power output and at the same time the velocity of discharge at runner outlet should be small to avoid cavitation ... A guide device for a diffuser at the compressor wheel outlet of a radial compressor has guide blades (10, 20) with stepped inlet edges (11, 21). In accordance with another aspect of the invention vane stagger angle and vane chord are locally increased over the outer one-fourth span portion. 636–645. The TRS comprises of an outer ring, an inner ring and radial struts, so-called outlet guide vanes (OGVs). Inlet guide vanes (IGV) The function of inlet guide vanes is to direct the flow in the desired direction at the entry of the impeller. of the absorber outlet duct, items located within the gas path such as internal duct supports, or on the liner wall. An oblique gust-prediction model is then developed. By another aspect of the invention, the radially inboard span portion comprises about 75% of the span and the radially outer span portion comprises about 25% of the span. Get Quote. This ONLY affects the AIAA Journal. [1] Gliebe P. R., “The GE90: Quiet by Design, Quieter Aircraft Engines Through Leveraging New Technologies,” Presentation for 2003 Berkeley Airport Noise Symposium, March 2003; also Thomas R. H., Burley C. L. and Olson E. D., “Hybrid Wing Body Aircraft System Noise Assessement with Propulsion Airframe Aeroacoustics Experiments,” Presentation for 2003 Berkeley Airport Noise Symposium, AIAA Paper  2010-3913, 2010. No. The guide vanes( also called as wicket gates) are fixed between two rings. The rotating speed is 1450 r/min. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BUSHNELL, PETER R.;REEL/FRAME:023313/0692, PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY, Geared gas turbine engine with reduced fan noise, Geared low fan pressure ratio fan exit guide vane stagger angle, Centrifugal fan assembly and methods of assembling the same, Gas turbine engine having support structure with swept leading edge, Detuning trailing edge compound lean contour, Vane axial fan with intermediate flow control rings, Uav ducted fan swept and lean stator design, Use of bowed nozzle vanes to reduce acoustic signature, Root bow geometry for airfoil shaped vane, TURBOMACHINE STATOR DAWN, BLOWER CELL COMPRISING SUCH A BLADE, PUSH INVERSION SYSTEM OF A TURBOMACHINE EQUIPPED WITH SUCH A BLADE AND TURBOMACHINE EQUIPPED WITH SAID BLADE, OF SAID CARTER OR DUDIT SYSTEM, Air deflector and the electric tool for including it, Guide vane assemblies in annular fluid ducts, Bowed airfoil for the compression section of a rotary machine, Reduced noise fan exit guide vane configuration for turbofan engines, Stator vane having both chordwise and spanwise camber, Gas turbine engine including multiple curved stator vanes and method of assembling the same, High-pumping, high-efficiency fan with forward-swept blades, Transonic compressor rotors with non-monotonic meanline angle distributions, Blade row for a rotary machine and method of fabricating same, Compressor end-wall treatment having a bent profile, Centrifugal compressor impeller with non-linear wing leading edge and related design method, Streamlined annular volute for centrifugal blower.

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