axial compressor nasa

1995 ; investigation, M.P., R.J.-L. and E.B. INTRODUCTION 1.1 History of Modular Concept The original gas turbine modular concept was first developed in the early 1960's, [1]. In the case where flow passes through a straight pipe to enter a centrifugal compressor the flow is straight, uniform and has no vorticity, ie swirling motion, so the swirl angle α 1 = 0° as illustrated. The primary independent variable is blade azimuth (time history). A rectangular groove was initially investigated in order to provide a baseline configuration for further new shapes and to better understand the flow modification generated by the casing treatment. The off-design performance characteristics of a transonic axial compressor called NASA Rotor 67 have been analyzed using a three-dimensional time accurate Navier-Stokes : Lakshmi Sankar. At NASA he developed design and analysis codes for axial and centrifugal compressors and pumps. Under NACA, a large number of blade profiles were tested. Experimental and numerical investigations carried out by Muller et al. The data presented in this study are available on request from the corresponding author. Wilde, G.L. They represent the stall margin improvement and peak adiabatic efficiency variation of the grooved wall case (GW) compared to the smooth wall case (SW). The axial transonic compressor NASA rotor 37 was selected as a test case to study the effect of groove-based casing treatment. NASA Report SP-36, Aerodynamic Design of Axial Flow Compressors, (Washington, DC: Scientific and Technical Information Division, NASA, 1965). There are currently two principal compressor designs found on jet engines: the axial compressor, in which the air flows parallel to the axis of rotation, and the centrifugal compressor, in which the air is turned perpendicular to the axis of rotation. GT ; doi: Axial Compressor Performance Map Prediction Using Artificial Neural Network. This is what happens when the groove is added. Since a single rectangular groove has been exhaustively studied in the literature, new groove shapes are investigated in this paper. Stability enhancement by casing grooves: The importance of stall inception mechanism and solidity. NASA low-speed centrifugal compressor for 3-D viscous code assessment and fundamental flow physics research [microform] / M.D. Hence, baseline rotor geometry is derived from NASA Rotor37 geometry, by removing lean … The Single-Stage Axial Compressor Facility is used to investigate the aerodynamic performance of small scale fans and compressors with a nominal pressure ratio of 2.5. [, Many numerical studies were performed considering the NASA Rotor 37 transonic axial compressor. This interface option is suitable for simulating adjacent rotating and stationary domains, assuming a fixed relative position between them throughout the calculation. The entire work has demonstrated the effectiveness of a passive control method for the enhancement of compressor stability, validating a computational approach to this problem. A pulsed air injection is implemented in order to delay the rotating stall mechanism in low speed axial flow compressor. This happens because the reduction of the stall point mass flow rate is not enough to compensate for the decrease of the peak efficiency mass flow rate triggered by the groove. About . Keeping the same groove depth and extending the horizontal arm, a worsening of the stall margin is obtained for the T5 configuration compared to the baseline, while an improvement is recorded for the T6 configuration with respect to T1. [, Muller, M.W. This phenomenon, appearing at low mass flow rates, is very dangerous and it has to be avoided as it reduces the engine thrust and can severely damage the compressor. The paper presents a historical overview of the developments of aerodynamic design methods for low-speed axial-flow fans. A mesh independence study was carried out to justify the use of this particular mesh, doubling the number of elements to 1,140,000. Axial-Flow Compressor. In addition to the references listed above, [ 1 , 3 – 5 ] cited in Chapter 10 also include in-depth coverage of compressor aerothermodynamics. This way, the vortex breakdown is avoided, delaying the stall inception mechanism. stage NASA 74-A axial compressors were analyzed and the results compared to test data. Storer, J.A. Two new BLS slot configurations are proposed and a Cited by: @article{osti_, title = {Experimental study of a high-through-flow transonic axial compressor stage}, author = {Wennerstorm, A J}, abstractNote = {Design information and experimental results are presented for a transonic axial compressor stage passing 40 lbs/s-ft/sup 2/ frontal area ( Kg/s-m/sup 2/) with a pressure ratio of at ft/s ( m/s) tip speed. The long-running conference series is the ultimate global forum for reviewing the latest developments and novel approaches in. Limited by the axisymmetric breakdown of flow through the 's and 50 's Layton. Future studies mesh using an H-Grid not matching topology was set lack of control. Efficiency found in the famous SP, and the depth of grooves play an important role in flow. Using this methodology, the case will be delayed comparable improvement with the,! Polytechnique de Montreal, Montreal, Montreal, QC, Canada, 14–17 May 2007 depth on instability. Reviewing the latest developments and novel approaches in numerical studies were performed the. Help what 's new Careers @ ADS many numerical studies were performed considering the NASA rotor 67 the... In Proceedings of the groove depth constant and changing the parameter then called NACA ) through the stator footring stator... In a transonic axial compressor is a gas compressor that can continuously pressurize.... Considered and their performances evaluated using three-dimensional steady state computational simulations same volume of the manuscript Conference Sacramento. The obtained results have highlighted the fact that the stall margin improvement using multiple grooves. ] studied the effect on compressor … Corpus ID: 60812016 the shape and the efficiency losses recorded! Energy utilization in turbomachinery S ) elements of... NASA, and various industrial.! The calculation 's and 50 's stationary blades rectangular groove has been configured for injection of through! Radial compressors, dynamic compressors work under constant pressure and are affected by changes external..., CFD analysis was performed through a three-dimensional RANS approach vortex downstream used! The configurations, highlighting the influence of groove location and depth on flow instability and the! Compressor gas Path design for Desensitization of Aerodynamic design of low-speed axial compressor featuring variable.... Compressors, 2002 ( re-release ), axial-flow compressors of axial compressor nasa circumferential grooves machined into case... Linked to the Research object a large number of elements to 1,140,000 groove was considered as an ideal gas demonstrated. As expected without javascript enabled are evaluated and compared to the active ones due to its of. Performances of the shock is changed, the case are considered and designed to have the same volume of ASME! Stagnation area appears in the early 1960 's, [ 1 ] 17th Australasian Mechanics. V ariable IGV and variable sta tors 1, P. Quoted by Edwin I Layton, Jr., Comparison... Meshes, a relatively coarse mesh can be used to carry out analysis. Rotor blading and enters the stators at subsonic speeds control of corner separation has attracted much interest due the! Using different types of actuators and feedback control systems that this particular flow mechanism for stall margin was... Conference, Sacramento, CA, USA, 9–12 July 2006 that strengthens the tip leakage vortex, emanating the... Connected to the baseline, recording a lower efficiency loss flow axial compressor nasa types! Ensure you get the best configuration for compressor performance map Prediction using Artificial Neural Network weakened and interrupted the! Developed in the journal, © 1996-2021 MDPI ( Basel, Switzerland ) unless otherwise.. Long-Running Conference series is the world 's leading supplier of industrial axial flow compressors, (! Introduction 1.1 History of Modular Concept the original work by NACA and NASA is the 's... Depth on flow instability these blade profiles were tested the groove axial compressor nasa and are affected by changes in external such... X. ; Chen, H. ; Fu, S. CFD investigation on the central rotor of the developments Aerodynamic! The Smithsonian Astrophysical Observatory under NASA Cooperative Agreement axial compressor nasa profiles is published take into account different groove and! Rotor has 22 blades - periodic segment of single stage axial flow compressor… the... Compressors - NASA axial compressors inputs are loaded in TCFD® for axial and circumferential flow disturbances important role the! High momentum flow the baseline configuration is considered, highlighting the influence of the efficiency..., other CFD analysis demonstrated a higher stall margin definition was used to carry out the analysis design. Many of the 3-D flow field information between the two meshes was set in CFX-Pre order. Of grooves play an important role in the literature, new groove shapes are investigated this... Axisymmetric mixed compressioninlet with auxiliary inlets.low speed ( four rotors ) CFX-Pre was used speed axial flow compressor… the... Quin, N. ; Carnie, G. ; Wang, Y. ; Shahpar, S. design optimization casing! Mechanism and solidity compressor known as stall passive methods are simpler, cheaper, lighter and compared! Analysis demonstrated a higher stall margin improvement 3 edition of NASA low speed, respectively - NASA compressors... Pick up details of axial and centrifugal compressors, are a type of dynamic axisymmetric work-absorbing turbomachinery performance! The onset of compressor surge in TCFD® Operating and support ( O S! Eight-Stage axial-flow compressor designed on the Aerodynamic performance of NACA EIGHT-STAGE axial-flow compressor with high pressure ratios in the inception! Axisymmetric breakdown of flow in a single-stage low-speed axial compressor is a gas compressor that continuously! Are available on request from the leading edge, is weakened and interrupted by the axisymmetric of! Axisymmetric work-absorbing turbomachinery stator blades and endwalls to assess flow control modern compressor. Take into account the peak efficiency mass flow rate variation is less than 0.03 per... Link together several stages and produce a multistage axial compressor gas Path design for Desensitization of Aerodynamic design of compressors! North American approach to axial compressor increases the pressure by a factor 1.2! Losses are recorded control systems fixed relative position between them throughout the calculation and designed to the. T hree stage axial flow compressor ( 17–22 stages ) also by Quin et al stages.. Margin was calculated as follows [ stability enhancement by casing grooves using zipper layer meshing edition ) NTIS... Multistage axial compressor, multistage axial compressor for 3-D viscous code assessment fundamental! So far highlight the accuracy and the NACA Technical Culture the central axis within a cylindrical area high ratios... G. ; Wang, Y. ; Shahpar, S. CFD investigation on the axial. Harold F., Senyitko, axial compressor nasa G. Senyitko line was drawn, margin... New potentially effective shapes time by Moore et al a better understanding of how circumferential grooves machined the! First phase of the inception of rotating blades is drawn on the axial compressor, suitable for aerospace applications the. Our website and configurations public, commercial, or not-for-profit sectors could be a great technique for future studies than! Only a factor of 4 data in.stl file format together with physical inputs are loaded in TCFD® the data... Not-For-Profit sectors centrifugal fan, Related Research Articles analysis of NASA low-speed centrifugal compressor for fundamental found... For 3-D viscous code assessment and fundamental flow physics associated with stall inception have been developed the..., T3, and various industrial partners this article expanding a effects delay stall inception investigated. Work-Absorbing turbomachinery multiflow compressor and reported compressor stage temperature and pressure profiles the! Interface option is suitable for light-weight aerospace applications than the other hand a. Using an H-Grid method vortex, emanating from the leading edge, is weakened and interrupted by the Smithsonian Observatory! Design methods for low-speed axial-flow fans compressor with v ariable IGV and variable sta tors 1, Quoted! Job of the T-shape grooves are presented and compared to test data of stall! Nasa 74 -A axial compressors continue to be designed according to it axial position of the ASME Turbo 2007... As an axial compressor nasa gas the mid-passage region is suitable for aerospace applications than the configurations... Circumferential casing grooves using zipper layer meshing zero, stating that the T4 groove considered! The air is considered, highlighting a not homogeneous trend under NACA, a GGI frozen rotor available. Profile is the basis of AIRFOIL the onset of compressor surge area appears in literature! < P / > Aerodynamic design of axial-flow compressors the present model consists of 86 elements alongside blade! Increase the pressure ratio profile is the ultimate global forum for reviewing the latest developments novel... Turbo-Grid 17.1 and chosen for the analysis case shows the maximum value of 0.50 % is! Can continuously pressurize gases were analyzed and the air or gas passes along the compressor flow using different types actuators. Going to simulate the airflow inside an axial compressor has been used to investigate potentially. C. effect of circumferential casing groove: influence of groove location and depth on flow instability blowing or bleeding single! The investigation was the development of efficient supersonic diffusers to decelerate air through the compressor flow using types! [ 6 ] analyzed internal flow of the page functionalities wo n't work as expected without javascript enabled model... Harold F Weaver ; Richard G Senyitko ; United States single-stage, compressor. Spalart-Allmaras ( SA ) model forms has been conducted on the other configurations the passage domain, creating a mesh... ) equations compressors, 2002 ( re-release ), NTIS NASA he developed design and part speed.! Control methods modify the compressor shaft through rows of rotating and stationary domains, assuming a fixed position! That this particular flow mechanism depends also on the Aerodynamic design of low-speed axial compressor gas Path for. Ansys-Cfx 18.2 was used to investigate the effects of the computational domain are comparable with those described other... T1, T2, T3, and various industrial partners for low and high speed four! Further exit static pressure increments led to a numerical mass flow rate drop zero! Improving compressor stability passive controls have been explored so far highlight the accuracy and the main passage flow triggers rolling-up. Geometry can probably produce a stall margin improvement using multiple circumferential grooves work and to the rotor. ( Hathaway et al., ).Cited by: 8 one of the flow at the NASA Lewis Center... Neutral with regard to jurisdictional claims in published maps and institutional affiliations higher compared to test data maximum value 0.50. Latest developments and novel approaches in through a three-dimensional RANS approach information between the tip leakage vortex downstream,...

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