flow analysis IEEE PAPER
serpentine inlet duct with cfd flow analysis
Effectiveness of a serpentine inlet duct flow control scheme at design and off-design simulated flight conditions
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To improve aircraft thrust to weight ratio, the serpentine shape of the inletduct is becoming more aggressive as an ultra-compact,propulsion system. The more aggressive inletducts result in increased turning whichThe compact nature of the duct limits
Analysis of turbulent flow in 180 deg turning ducts with and without guide vanes
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PIV measurement of secondary flow in a rotating two-pass cooling system with an improved sequencer technique
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Active flow control in an advanced serpentine jet engine inlet duct
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highly three-dimensional inlets. Page 20. 11 EXPERIMENTAL SETUP AND PROCEDURESIn Figure 7, the serpentineinlet experimental setup is pictured. Page 26. 17Equation 1. This quantity provides a measure of the pressure recovery of the inlet. 100* 8 8 q
Requirements and Advances in Simulating Aircraft Inlet Total Pressure Distortion in Turbine Engine Ground Tests
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Inlets HIGH /Pt0 LOW Figure Taken
Laminar flow in a periodic serpentine channel
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Figure 2: Mesh density (a) on the duct cross-section, (b) along the duct.where po,m and pi,m the mean outlet and inlet pressures, respectively.where Nuserpentine and Nustraight are the average Nusselt numbers for the serpentine channel and an equivalent length of pipe
Non-Newtonian and Gas-non-Newtonian Liquid Flow through Elbows- CFD Analysis
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Numerical simulations are performed for the dilute gas-solid flow through rectangular duct containing a horizontal to vertical bend ofis laminar in all cases the viscous model, ie, laminar non-Newtonian Power Law model is used for the CFDanalysis.(iii) At the inlet, a uniform
CFD Simulation of S-Duct Test Case Using Overset Grids
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One of the most important aspects for the inlet aerodynamic simulation is to predict theof an overset CFD code to properly simulate the internal flow for the serpentine diffuser S Analysis and Experimental Data Comparison of Compressible Flow in a Diffusing S-Duct, AIAA-92
Effect of BLI–Type Inlet Distortion on Turbofan Engine Performance
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of the performance of an engine subjected to distortion typical of BLI systems with serpentine inlets is warranted.and calibrated to create a profile similar to NASA's Inlet A, a serpentineinlet that isrequired to maintain fan stability with the severe flow distortion of the Inlet A profile
Evaluating AC and DC Furnace water-cooling systems using CFD analysis
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shown in Fig 3. The joint lines between the panels were arranged relative to the major port and duct positions toCylindrical baffles were shown to be effective at dispersing flow across the panel cross section between the inlet and outlet without serpentine passages but
Efficient prediction of nacelle installation effects at take-off conditions
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INTRODUCTION Take-off flight conditions represent a challenging flow behavior for aircraft engine inlets, which have toed aero-eng be simulate fully applied huge resour for day-to-d n CFD and atinstallat ed and analy d to simulat rces in term day engineer CAA cou inlet is use
Applied aerodynamics
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The CFD results were used to select the best options for a series of low- and highUsing feedback control to adjust the blowing rates of microjets located along the duct, pressure recovery and distortion charac- teristics of the ultracompact, serpentineinlet were improved
A Computational Study of Compressor Inlet Boundary Conditions with Total Temperature Distortions
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45 Table 3-4: Straight Duct with Injection Boundary Conditions .. 48 Table 3-5: Serpentine Duct with Injection Boundary Conditions..nd engine order harmonic. Both distortions were representative of gas turbine engine inlet environments inlets.
Particle image velocimetry in an advanced, serpentine jet engine inlet duct
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engine performance. Ideally, inlets should decelerate incoming flow, minimize pressuredifference creates a transverse or cross-stream flow towards the center of the duct, wherein Figure 1. Serpentineinletducts typically exhibit excessive engine face distortion, pressure
Effect of Inlet Flow Conditions on Flow Uniformity in a PEM Fuel Cell
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Straight channels were used to represent each cell, instead of the actual serpentine geometry, because of the Flow distributions within the cells were also affected by the presence of the pipe inlets, particularly at the[7] McGarry, M.Grega, LM 2006 Effects of inlet mass flow
Design and evaluation of the helical-coil sodium-to-air heat exchanger of stella-1
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Serpentine-type and helical-coil sodium-to-air heat exchangers have been considered for air AHX using reasonable heat transfer and pressure drop models, and provides the CFDanalysis results toAtmospheric air enters the air inletduct at the lower part of the unit and flows
Numerical Study of the Flow inside the A250 Diffuser Tube
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[10] Taylor AMKP, Whitelaw JH, Yianneskis M: Developing flow in S-shaped ducts, II – Circular conf., AIAA-94-0658, 1994. [13] Kirk AM, Gargoloff JI, Rediniotis OK, Cizmas PGA, Numerical and experimental investigation of a serpentineinletduct, IJ CFD, 23:245-258, 2009.
Thermal analysis and experimental validation of laminar heat transfer and pressure drop inserpentine channel heat sinks for electronic cooling
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Investigation of Total Pressure Distribution at Aerodynamic Interface Plane of an S-shaped Air Intake at Sideslip Condition
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Similarly in reference [13], duct pressure loss in low speeds for a serpentine intake isand Reduced Navier-Stokes Analysis for Separating Flows within a Diffusing Inlet S-Duct and BG Allan, Experimental and Computational Evaluation of Flush-Mounted, S-DuctInlets, in 42nd
CFD STUDY OF AIR INTAKE DUCT
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the control of total pressure recovery and distortion at the engine face of a serpentineinlet.P, Patel VK, Jain A. Comparative Studies On Flow Control In Rectangular S-Duct Diffuser Using Comparison of F/A-18A InletFlow Analyses with Flight Data Part 2. Journal of Aircraft 1996
Flow control optimization in a jet engine serpentine inlet duct
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It is realized that though curved serpentineinlets have various benefits over conventional inlets, the flowserpentineducts, much research work was carried out at Texas AM University as partVarious CFD studies have been conducted on inletducts
ces of t pentin
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Simulation of Flow Control in SerpentineDuct. AIAA, 2009.[4] RV Chima, DJ Arend, RS Castner, JW Slater, PP Truax. CFD Models of a SerpentineInlet, Fan and Nozzle.[6] Anthony M. Ferrar. Measurements of Flow In Boundary Layer Ingesting SerpentineInlets.
Computational Study of center line turning angle effect on the turbulent flow through a diffusing S-duct using Large-eddy simulation
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2] Rabe AC, Effectiveness of a SerpentineInletDuctFlow Control SchemeSoo-Yong, "Three Dimensional Compressible Turbulent Flow Computations for a Diffusing S-duct with/without R.Levy A design strategy for the use of vortex generators to manage inlet-engine distortion
INVESTIGATION OF FLOW CONTROL IN TRANSITION AIR-INTAKE USING SYNTHETIC JET ACTUATOR
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A serpentineinlet can be used to hide the line of sight to the compressor face in order toby the average value of the mass- averaged velocity measured at both the inlets of airWang JinJun, Numerical investigation on synthetic jet flow control inside an S-inletduct, 2012, Science
Integrated Technology Investment Plan for Aeropropulsion Testing at Arnold Engineering Development Center
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complete flight type engines or heavier boilerplate versions in which inlets, compressors, combustorsIn spite of these limitations, CFD solutions of inletductflows have been useful inof the insight provided by inletCFD from a typical serpentineinletduct computation, showing
Numerical Modeling of Velocity and Temperature Distributions in a Bipolar Plate of PEM Electrolysis Cell With Greatly Improved Flow Uniformity
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The different designs of the flow channels are serpentine, spirals, cascade and series-parallel with variousa new bipolar plate was designed by changing the header section, inlet and outlet Since the number of inlets was increased with the flow rate remaining unchanged, the
Dynamic distortion simulations for curved aeronautical intakes
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by Berends et al [7] for an S-duct and Delot et al [8] for a serpentineduct typical ofThe offset, however, determine a remarkable drop in the pressure (S-Duct 2A against S-Duct 3). Theof the static pressure sp is outlined in Figure 3, normalized with the inlet dynamic pressure p0in
NUMERICAL INVESTIGATION OF INLET DISTORTION INDUCED SWIRL IN MULTISTAGE FANS
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For high-performance applications, components with serpentineinlets generate swirl as well at the fan10] Seddon, J., Understanding and countering the swirl in S-ducts: tests onSirbaugh, J., A Numerical Simulation Capability for Analysis of Aircraft Inlet – Engine Compatibility
An Improved Streamline Curvature Approach for Off-Design Analysis of Transonic Axial Compression Systems
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The use of serpentineinletducts and fighter supermaneuvers further complicate the issue.could result in a significantly improved tool for analyzing complex engine- inlet integration issues multistage fans and comparison with results from experimental data and/or CFD solvers is
Compare new designed flow channels of interconnect for planar SOFCs with typical channels
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results demonstrate that the ratio of the outlet manifold width to the inlet manifold with isnamely rectangular duct with different numbers of grid points and trapezoidal duct with differentof bipolar plates in planar fuel cells for: (a)serpentine channel; (b) parallel serpentine channel
Numerical study of the mixture of two miscible fluids in a chaotic geometry.
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square sections at the inlet (aspect ratio = 1) (Figure 1). The inlet section ishorizontally and vertically in different geometries (straight channel, Serpentine-2D and Serpentine-3D) wasH., Experimental study of chaotic advection regime in a twisted ductflow, European Journal of
CFD ANALYSIS AND ENHANCEMENT OF HEAT TRANSFER IN RECTANGULAR CHANNEL USING BLOCKAGE WITH ELONGATED HOLE
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cooling is to cool the blade by air impingement on the surfaces of serpentine passagesBut as gas turbine technology has been developed, the rotor inlet temperature has been also increased for3. In the CFDanalysis we have assumed that the duct wall as prefect adiabatic wall
Conjugate Heat Transfer Analysis in an Actual Gas Turbine Rotor Blade in Comparison With Pyrometer Data
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many companies that manufacture gas turbines have competed to achieve higher temperatures at turbine inlets.The blade we considered in this research had two internal serpentine cooling passages with ribThe HTC distributions were obtained based on inlet temperature T0.
Lattice Boltzmann Method Simulation of 3D Fluid Flow in Serpentine Channel
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analyt- ical methods have been proposed for determining the correlation between the friction factor and the Reynolds number in noncircular ducts. Inlet channel 5 blocks 5 waves No obstacles Lattice Boltzmann Method Simulation of 3D Fluid Flow in Serpentine Channel 173
LES simulation and experimental measurement of fully developed ribbed channel flow and heat transfer
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Boundary conditions A periodic condition was applied to the inlet/outlet boundary assuming fully developedWJ and Zhang N., 1994,Local heat transfer in a rotating serpentine passage with Prediction of Turbulent Flow and Heat Transfer in a Rbbed Rectangular Duct with and
Design of Inlet for Boundary Layer Ingestion in a Blended Wing Body Aircraft
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BWB in clean configuration (without engines) to obtain velocity profiles over aft fuselage, where the inlets will beare chosen for the geometrical design of the inlet, namely inlet aspect ratio (ratio of inlet ellipse major axis length and semi-minor axis length), duct length and
CFD ANALYSIS OF MATRIX COOLING METHOD IN GAS TURBINE BLADES
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Internal cooling can be achieved by passing coolant through various enhanced serpentine passages inside the blade and extracting heat from outside of20 Fig 29 :- Velocity-contour at inletanalysis of HP stage gas turbine blades having helicoidal cooling ducts." (2014).
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