numerical study of the transition characteristics and

Numerical Study of Transition of an Annular Lift Fan Aircraft

2016-9-23The characteristics of momentum drag of the single-stage fans in transition are similar to that of the two-stage fans but with the peak of drag lowered from 0 63 to 0 4 of the aircraft weight Numerical Study of Transition of an Annular Lift Fan Aircraft

Numerical study on influences of barrier arrangements on

2019-4-29Numerical Study on Influences of Barrier Arrangements on Dielectric Barrier Discharge Characteristics Woo Seok Kang Jin Myung Park Yongho Kim and Sang Hee Hong Member IEEE Abstract— A numerical study has been carried out to under-stand the influences of barrier arrangements on the discharge characteristics of dielectric barrier discharge

Numerical Study on the Flow Characteristics of a Solenoid

2010-7-1Abstract: - Study on the flow characteristics of solenoid valves is essential since they play pivot role in a flow circuit for controlling the flow through a required path for a specified duration The flow characteristics of a 3/2 -way solenoid valve used in the four stroke propulsion engine of a ship is studied by performing numerical

Numerical study of the transition characteristics and

2020-5-8Numerical study of the transition characteristics and related degradation at the flange bearing frog Yuan Gao Jingmang Xu Ping Wang Zhiguo Dong Yibin Liu and Kai Wang Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit 0 10 1177/0954409720906636

Numerical study on wake characteristics of high

Numerical study on wake characteristics of high-speed trains 813 3 2 DES The DES approach is a hybrid method which combines RANS and LES together and benefits a lot in solv-ing large separation problems with high Reynolds num-bers[8 9 13 14] DES usually keeps high accuracy in pre-dicting aerodynamic drag and separation locations for large

Numerical study on wake characteristics of high

Numerical study on wake characteristics of high-speed trains 813 3 2 DES The DES approach is a hybrid method which combines RANS and LES together and benefits a lot in solv-ing large separation problems with high Reynolds num-bers[8 9 13 14] DES usually keeps high accuracy in pre-dicting aerodynamic drag and separation locations for large

Numerical simulation of aerodynamic characteristics of a

2015-4-3transition location at different Reynolds numbers and crossflow transition through the simulation of an infinite swept NLF(2)-415 wing In the present study numerical simulations on the geometry of the BWB UCAV configuration were conducted and the aerodynamic coefficients are compared with the experimental results by Shim et al [16]

NUMERICAL STUDY ON MODE TRANSITION OF AN OPEN

2020-4-22Numerical Study on Mode Transition of An Open Cavity with Lids 657 Inflow Buffer Zone Outflow (a) Full computational domain HH D L O W1 W2 (b) Configuration of cavity geometry Fig 1: Schematic diagrams of the cavity configuration and computational domain aspect ratio of the cavity are the same for all simu-lations and the simulation

Numerical study on the characteristics of solute

2018-11-1According the geometry parameters listed in Table 1 the geometric model of computational domain was created and discretized by ANSYS ICEM CFD 14 0 The meshes adopted in the numerical modelling of centerline segregation during the slab CC process are shown in Fig 1(a) The global maximum size of grid about the meshes is less than 10 mm and the total amount of elements is

Characteristics of Flow past Warped and Wedge

The present study includes the effects of various design changes in warped and wedge transitions on the behavior of flow emerging from transitions The efficiency of a good transition is measured in terms of its ability to provide a low value for the maximum velocity and a nearly uniform velocity distribution at the transition exit section

Numerical Study on Infrared Radiation Characteristics of

2008-6-16Abstract: Numerical simulations are conducted to analyze the effects of throat aspect ratio geometric pitch and yaw vector angles on the infrared radiation characteristics of spherical convergent flap nozzles (SCFN)Results of the study indicate that: ① As the throat aspect ratio increases the infrared radiation intensity in the vertical symmetry plane (zOx) decreasesWhen the throat aspect

Aerospace

The present study aimed at studying the transition of annular lift fan aircraft through computational fluid dynamics (CFD) simulations The oscillations of lift and drag the optimization for the figure of merit and the characteristics of drag yawing rolling and pitching moments in transition are studied The results show that a two-stage upper and lower fan lift system can generate

Numerical study on influences of barrier arrangements on

2019-4-29Numerical Study on Influences of Barrier Arrangements on Dielectric Barrier Discharge Characteristics Woo Seok Kang Jin Myung Park Yongho Kim and Sang Hee Hong Member IEEE Abstract— A numerical study has been carried out to under-stand the influences of barrier arrangements on the discharge characteristics of dielectric barrier discharge

Numerical Study of Transition of an Annular Lift Fan Aircraft

2019-5-1The characteristics of momentum drag of the single-stage fans in transition are similar to that of the two-stage fans but with the peak of drag lowered from 0 63 to 0 4 of the aircraft weight Numerical Study of Transition of an Annular Lift Fan Aircraft

Numerical Study on Ridge Ice Accretion and Its Effect Under

2018-6-15So the study on ridge ice is very important to flight performance and safety Numerical simulation is an important way to study the ice accretion of aircraft Several icing software has been developed abroad such as LEWICE [8] (USA) CIRA [9] (Italy) TRJICE [10]

Numerical simulation of aerodynamic characteristics of a

2015-4-3transition location at different Reynolds numbers and crossflow transition through the simulation of an infinite swept NLF(2)-415 wing In the present study numerical simulations on the geometry of the BWB UCAV configuration were conducted and the aerodynamic coefficients are compared with the experimental results by Shim et al [16]

A numerical study of shear layer characteristics of low

Direct numerical simulation (DNS) and dynamic mode decomposition (DMD) are used to study the shear layer characteristics of a jet in a crossflow Experimental observations by Megerian et al (J Fluid Mech vol 593 2007 pp 93-129) at velocity ratios of 2 and 4 and Reynolds number of 2000 on the transition from absolute to convective

A Numerical Study of Spray Characteristics in Medium

In the present study nonreacting and nonevaporating spray characteristics of heavy fuel oil (HFO)/n-butanol blends are numerically investigated under two different high pressure injections in medium speed engines An Eulerian-Lagrangian multiphase scheme is used to simulate blend of C 14 H 30 as HFO and 0% 10% 15#x25 and 20#x25 by volume of n-butanol

A Numerical Study of Spray Characteristics in Medium

In the present study nonreacting and nonevaporating spray characteristics of heavy fuel oil (HFO)/n-butanol blends are numerically investigated under two different high pressure injections in medium speed engines An Eulerian-Lagrangian multiphase scheme is used to simulate blend of C 14 H 30 as HFO and 0% 10% 15#x25 and 20#x25 by volume of n-butanol

Numerical Study of the Dynamic Characteristics of

2017-2-16Unsteady numerical simulations of pintle nozzles were implemented to investigate dynamic characteristics of various pintle configurations To take into account the effects of the pintle shape and movement a sliding mesh method was applied

NUMERICAL STUDY ON CHARACTERISTICS OF FLOW

NUMERICAL STUDY ON CHARACTERISTICS OF FLOW AND THERMAL FIELDS AROUND ROTATING CYLINDER Kamel Korib∗ Mohamed Roudane Yacine Khelili Department of Mechanical Engineering University Saad Dahlab Blida 1 Algeria Received 20 10 2019 Accepted 27 02 2020 Abstract In this paper a numerical simulation has been performed to study the fluid flow

Numerical Study of Transition of an Annular Lift Fan Aircraft

2016-9-23The characteristics of momentum drag of the single-stage fans in transition are similar to that of the two-stage fans but with the peak of drag lowered from 0 63 to 0 4 of the aircraft weight Numerical Study of Transition of an Annular Lift Fan Aircraft

Numerical study of heat transfer characteristics of downward

The heat transfer characteristics of China RP-3 aviation kerosene flowing in a vertical downward tube with an inner diameter of 4 mm under supercritical pressures are numerically studied A ten-species surrogate model is used to calculate the thermophysical properties of kerosene and the re-normalization group (RNG) k-ε turbulent model with the enhanced wall treatment is adopted to consider

A Numerical Study of Spray Characteristics in Medium

In the present study nonreacting and nonevaporating spray characteristics of heavy fuel oil (HFO)/n-butanol blends are numerically investigated under two different high pressure injections in medium speed engines An Eulerian-Lagrangian multiphase scheme is used to simulate blend of C 14 H 30 as HFO and 0% 10% 15#x25 and 20#x25 by volume of n-butanol

Numerical Study of Wake Characteristics in a Horizontal

2017-6-12Numerical Study of Wake Characteristics in a Horizontal-Axis Hydrokinetic Turbine PAULO A S F SILVA1 TAYGOARA F DE OLIVEIRA 1 ANTONIO C P BRASIL JUNIOR 1 and JERSON R P VAZ2 1Universidade de Braslia Faculdade de Tecnologia Departamento de Engenharia Mecnica Campus Universitrio Darcy Ribeiro Asa Norte 70910-900 Braslia DF Brazil