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Saturday, May 9, 2020 | History

3 edition of **Axisymmetric electromagnetic field influence on the characteristic velocity of an arc-jet** found in the catalog.

Axisymmetric electromagnetic field influence on the characteristic velocity of an arc-jet

- 107 Want to read
- 31 Currently reading

Published
**1984**
by National Aeronautics and Space Administration in Washington, D.C
.

Written in English

- Arc-jet rocket engines

**Edition Notes**

Statement | Mario Oggero and Dario Gennuso |

Series | NASA technical memorandum -- 77475 |

Contributions | Gennuso, Dario, United States. National Aeronautics and Space Administration, SCITRAN (Firm) |

The Physical Object | |
---|---|

Format | Microform |

Pagination | 1 v. |

ID Numbers | |

Open Library | OL14925285M |

This study concerns turbulent jets with density variations. The local statistical properties, obtained for the velocity field and the mean mass fraction, are needed both for better understanding of the density effects and for modeling of such flows. Special attention is paid to the near‐field region (x/D j ≤20), where there is a lack of experimental by: This paper presents shape optimization of moving core type solenoid actuator driven by DC source. 3-D axisymmetric finite element method(FEM) is used for the electromagnetic field analysis and Author: Eduard Plavec.

Mean velocity proﬁles Contour maps of the mean velocity ﬁeld normalized by the exit velocity for a Reynolds number of are presented at three downstream positions in ﬁgure 3. They show that the mean velocity ﬁeld is axisymmetric to within the statistical error, thus conﬁrming that an axisymmetric shear layer has been formed. A comprehensive study of a steady axisymmetric supersonic jet of CO 2, including experiment, theory, and numerical calculation, is experimental part, based on high-sensitivity Raman spectroscopy mapping, provides absolute density and rotational temperature maps covering the significant regions of the jet: the zone of silence, barrel shock, Mach disk, and subsonic Cited by:

Modeling Axisymmetric Flows: Dynamics of Films, Jets, and Drops is the first book to cover the topics of axisymmetric laminar flows; free-boundary flows; and dynamics of drops, jets, and films. The text also features comparisons of models to experiments, and it includes a large selection of 5/5(1). I'm in Portugal and trying to compute the atraction magnetic force on an plunger electromagnet with axisymmetric geometrie. I'm using the Femm To compute the force exerced on the iron can I just define a contour in the air around the iron (which means that one side of the contour will be on the line of coordinate z=0) and integrate the.

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AXISYMMETRIC ELECTROMAGNETIC FIELD INFLUENCE ON THE CHARACTER- /1* ISTIC VELOCITY OF AN ARC-JET** By Mario Oggero and Dario G:ernuso 1 INTRODUCTION The propulsive characteristics of an arc-jet depend on the quantity of heat introduced into the propellant gas and the efficiency of transformation of thermal to kinetic energy in the expansion nozzle.

Get this from a library. Axisymmetric electromagnetic field influence on the characteristic velocity of an arc-jet. [M Oggero; Dario Gennuso; United States. National Aeronautics and. Phase-field simulation of electric-field-induced in-plane magnetic domain switching in magnetic/ferroelectric layered heterostructures J.

Appl. Phys.(); / A method for applying a large persistent in-plane biaxial stress to influence the perpendicular magnetic anisotropy of magnetic thin films.

The magnetic field suppresses jet instabilities and increases the critical electric intensity of the dual effects on the axisymmetric mode. • The magnetic field favors the transition from axisymmetric to non-axisymmetric mode. • The magnetic field weakens viscoelastic effects, but has little influence on aerodynamic by: 2.

Axisymmetric Velocity Fields Next: Axisymmetric Irrotational Flow in Up: Axisymmetric Incompressible Inviscid Flow Previous: Stokes Stream Function According to the analysis of Appendix C, Equations () and () imply that.

The impinging distance is known to influence the structure of the flow field, mostly when the stagnation plate is in the near field region of the jet. Two density ratios were studied: an isodensity (R ρ = 1) and a light jet (R ρ = ).Author: I.

Serres, C. Chauveau, B. Sarh, I. Gökalp. The combustion particles are mainly affected by the air drag force, electric field force and gravity. The interaction and influence of temperature, fluid, electric field and the multi-physical field of particle motion are comprehensively analyzed.

A two dimensional (2D) axisymmetric simulation model is established by simplifying the flame : Ziheng Pu, Chenqu Zhou, Yuyao Xiong, Tian Wu, Guowei Zhao, Baodong Yang, Peng Li. As is well-known, an axisymmetric electromagnetic field decomposes into two independent field systems: an f-polarized field E= {0, 0}, H= [Hp, 0, H,} and an ^-polarized field H=={0, HV, 0}, E={Ep, 0, E,}.

By virtue of Maxwell's equations the independent components of the fields E Cited by: 2. Figure 2 shows the velocity triangle seen by a blade section at radius r.

The local velocity V~ relative to the duct is the vector resultant of the freestream velocity V∞, the induced velocity of the blade row and bodies ~v, and any “external” velocity ~u.

The latter might be due to an upstream rotor or obstruction. ~V = ~v+ ~u+ V ∞xˆ (1)File Size: KB. the flow velocity and a characteristic length: 𝑆𝑡𝐷 = 𝑓𝐷 𝑈𝑐 (1) where D, exit diameter of the tube is the characteristic length, f is the frequency which the vortical structures are formed and convect downstream and U c is the centerline velocity at the exit of the jet.

Previous research has shown that. of plastic yielding velocity ; () d n, a 2 3 I D I D e e 2() ()σ, - square and cubic invariants of 3 I D I D σ strain rate deviator De and stress deviator Dσ ac-cordingly.

A difficulty of the analysis of metal plastic form-ing processes with axisymmetric stress and strain fields is. given the large velocity gradients of the initial region.

The traditional measures of mass and momentum flux and, also, statistical measures of the velocity distribution were made with somewhat unexpected results. Formulation of the problem The axisymmetric turbulent free jet.

Where, V is the velocity at any position of the jet exit; V max is the maximum velocity at the jet exit; V b represents the bulk velocity at the jet exit, which can be defined as V b = 4Q/πD 2 (Q. The internal contour of thenozzle is defined by the JMAX grid line of zone 1.

The externalcontour of the nozzle is defined by the J1 grid line of zone 2. Thereis a small base area at the exit of the nozzle connecting the internaland exterior contours. This is part of the I1 grid line of zone 3. Experimental and numerical investigation of an axisymmetric freejet K B S N Viswanath & V Ganesan more characteristic of the profiles in the self-similar region, while the profiles of the Reynolds number of the velocity field in a two-dimensional plane jet was calculated quite.

The effect of nozzle geometry on the structure of a supersonic free jet is investigated both experimentally and numerically for three simple nozzle geometries. In the experiments, the relation between the Mach disk height and diameter and the nozzle pressure ratio are investigated using the schlieren method.

In contrast to results obtained in previous studies, our experimental results show Cited by: Comparison of the measured and computed mean axial velocity and turbulent shear stress profiles demonstrates the important influence of turbulence modelling in CFD prediction of the stern flows.

The data illustrates the modifications by various appendages of the basic axisymmetric thick turbulent boundary layers over the by: The flow field surrounding an axisymmetric, confined, impinging jet was investigated with a focus on the early development of the triple-layered wall jet structure.

Experiments were conducted using stereo particle image velocimetry at three different confinement gap heights (2, 4, and 8 jet diameters) across Reynolds numbers ranging from to Cited by: Spatial instability of axisymmetric electrically forced jets with variable applied field under idealistic conditions of zero or infinite electrical conductivity was studied analytically by Riahi ().

He reported two spatial modes of instability each of which was enhanced with increasing the strength of the externally applied electric field.

The evolving shape of the structure as it travels downstream helps explain the transverse variations of the wavelength and convection velocity across the mixing layer.

The coherent structure characteristics are found to be independent of whether the initial boundary layer is laminar or turbulent, but depend somewhat on the jet Reynolds by:.

Progress In Electromagnetics Research B, Vol. 32, {, AXISYMMETRIC ELECTRIC FIELD CALCULATION WITH ZONAL HARMONIC EXPANSION F. Gluc˜ k1,2,* 1Karlsruhe Institute of Technology, IEKP, POBKarlsruhe, Germany.Axisymmetric Synthetic Jets: An Experimental and Theoretical Examination Gopi Krishnan∗ and Kamran Mohseni† University of Colorado, Boulder, Colorado DOI: / Theﬂowﬁeldof around synthetic jet driven byapiezoelectric File Size: 4MB.throughout the flow field involving turbulent jets.

The most common jet used for research has been the axisymmetric jet. The axisymmetric jet is comprised of three regions based on the velocity field: the near-field, the transition, and the far-field regions. The near-field is the region where the characteristics .