Effects of VNT and IGV association on turbocharger centrifugal compressor performances

Izidi, Lahouari; Liazid, Abdelkrim

doi:10.5755/j01.mech.17.2.332

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…The pressure difference gives a technical basis for studying the aerodynamical moment and frictional moment of the guidance blade. At the same time, the pressure field distribution of guidance blades was compared with the results from Izidi and Liazid [4], Luo et al [13], and Touil and Ghenaiet [26]. The accuracy of the pressure field distribution of guidance blades has been compared and verified.…”

Section: Pressure Field Analysismentioning

confidence: 99%

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Study of blade moment calculation on variable geometry turbine adjusting mechanism

Zhong,

Chen,

Qin

et al. 2024

J. Phys.: Conf. Ser.

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In recent years, the layout of rotary instructing leaves in mutable loop worm wheels has been a research hotspot. The rotary instructing leaves are subjected to the action of hyperthermal and nippy airstream and the influence of frictional force on the spin axis. For the rotary instructing leaves, the combined action of hyperthermal and nippy airstream generates an aerodynamical moment, while frictional force generates a frictional moment. When the rotary instructing leaves rotate, the aerodynamical moment and frictional moment constantly change as the angular motion of the blades. This research is rare, and there is no mature case for reference. The article applies fluid-structure coupled heat transfer and software programming to seek the blade moment. During the process of blade angular motion from -10° to +10°, the total moment of the blade earlier rises and afterward falls. When the blade angular position is -2°, the total moment runs to vertex 3.74489 N·m. Test data from the exploration laboratory have validated this conclusion. The maximum deviation compared to the test data of the exploration laboratory is 4.562%. The aerodynamical and frictional moments are momentous indicators for mutable loop worm wheel study. They can offer physical references for the mutable loop design of a turbo. The paper can also offer a new method for the blade moment calculation. This is important sense for the innovation of mutable cyclic worm wheels.

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Section: Pressure Field Analysismentioning

confidence: 99%

“…At the same time, it is also concluded that the torque and power produced by asymmetric blades are greater than that of symmetric blades. Izidi and Liazid [4] studied the influence of area change on work efficiency at the exit and imported leaves. This technology improves the performance of the compressor in the whole working range.…”

Section: Introductionmentioning

confidence: 99%

Study of blade moment calculation on variable geometry turbine adjusting mechanism

Zhong,

Chen,

Qin

et al. 2024

J. Phys.: Conf. Ser.

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“…where λ H is excess air factor at altitude H above sea level, π KH is air pressure increase rate in compressor above sea level, H > 0; π k0 = P outlet /P intlet is air pressure increase rate in the compressor at altitude H = 0 m [9]; n H is air compression polytrophic ratio in compressor. Nondimensional heat transfer characteristic (K Q ), heat amount required to vaporize and overheat a kilogram of the fuel by injection into the compressed air of the engine cylinder at temperature T C (q T ), cylinder volume at the fuel injection moment (V IP ) , fuel ignition delay (φ 1 ) and fuel rapid combustion period (φ 2 ) and cycle maximum pressure (P Z ) are calculated as follows…”

Section: Calculation Of Military Fuel Combustion Ratementioning

confidence: 99%

A Theoretical Study of Military Fuel Combustion Rate in Diesel Engines Under High–altitude Conditions

Dobržinskij

2013

mech

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“…Centrifugal compressor, which is the most available highspeed turbomachinery [2], is featured in high rotational speed, centrifugal force, and stability. Exhaust flow from engine is directed over turbine blades to drive the turning of compressor and shaft.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Simulation of Elastoplastic Contact Analysis of Compressor by Overspeeding

Liao

Chai

Yang

2014

Advances in Mechanical Engineering

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This study analyzes the stress distribution of 3D elastoplastic contact problems by using the FE parametric quadratic programming (PQP) method derived from a 3D FE model based on parametric variational principle (PVP). We numerically analyze a 24-blade compressor by combining centrifugal loading with interference-fit one. To accelerate computation, calculation is simplified by structural modeling via multisubstructuring, aiming to deal with FE-simulated computer aided design (CAD) conveniently. We then analyze the relationships between the maximum residual stresses of the compressor posterior to prestressing and overspeed rpms, and we also study the distribution and magnitude of the contact stresses of the compressor in working conditions after overspeed prestressing. Moreover, we thoroughly discuss the distribution and magnitude of the contact stresses of shaft-shaft sleeve-impeller in working conditions. Relative displacement can be prevented and contact stress can be kept uniform due to the nonuniform initial amount of interference in overspeed prestressing. This paper summarizes the FEM simulation results and provides reference data for improving the design and processing of compressor impellers, indicating that overspeed is indispensable in manufacture.

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Effects of VNT and IGV association on turbocharger centrifugal compressor performances

Abstract: w-prewhirl angle, deg; 'H SF-skin friction losses; 'H P-power losses; 'H L-leakage losses; 'H DF-disc friction losses; 'H BL-blade loading losses; 'H INC-incidence losses;

Cited by 3 publications

References 12 publications

Study of blade moment calculation on variable geometry turbine adjusting mechanism

Study of blade moment calculation on variable geometry turbine adjusting mechanism

A Theoretical Study of Military Fuel Combustion Rate in Diesel Engines Under High–altitude Conditions

A Numerical Simulation of Elastoplastic Contact Analysis of Compressor by Overspeeding

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