Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Propulsion (5)
- Computational fluid dynamics (4)
- Matlab (4)
- CFD (3)
- Composites (3)
-
- Finite Element Analysis (3)
- Manufacturing (3)
- Orbit (3)
- Railgun (3)
- Ramjet (3)
- Rocket (3)
- Simulation (3)
- UAV (3)
- Vacuum (3)
- Aerospace (2)
- Composite (2)
- CubeSat (2)
- De-orbit (2)
- EMRG (2)
- Electric (2)
- Electric Propulsion (2)
- Engine (2)
- Environment (2)
- Flight Test (2)
- GUI (2)
- Ground Support Equipment (2)
- Hybrid (2)
- IMU (2)
- Inlet (2)
- MiXI (2)
- Publication Year
- Publication Type
Articles 271 - 278 of 278
Full-Text Articles in Engineering
Numerical Design Of Advanced Multi-Element Airfoils, Donovan L. Mathias, Russell M. Cummings
Numerical Design Of Advanced Multi-Element Airfoils, Donovan L. Mathias, Russell M. Cummings
Aerospace Engineering
The current study extends the application of computational fluid dynamics to three-dimensional high-lift systems. Structured, overset grids are used in conjunction with an incompressible Navier-Stokes flow solver to investigate flow over a two-element high-lift configuration. The computations were run in a fully turbulent mode using the one-equation Baldwin-Barth turbulence model. The geometry consisted of an unswept wing which spanned a wind tunnel test section. Flows over full and half-span Fowler flap configurations were computed. Grid resolution issues were investigated in two-dimensional studies of the flapped airfoil. Results of the full-span flap wing agreed well with experimental data and verified the …
Computational Analysis Of Forebody Tangential Slot Blowing, Ken Gee, Roxana M. Agosta-Greenman, Yehia M. Rizk, Lewis B. Schiff, Russell M. Cummings
Computational Analysis Of Forebody Tangential Slot Blowing, Ken Gee, Roxana M. Agosta-Greenman, Yehia M. Rizk, Lewis B. Schiff, Russell M. Cummings
Aerospace Engineering
No abstract provided.
Numerical Prediction Of Transition Of The F-16 Wing At Supersonic Speeds - Final Report, Russell M. Cummings, Joseph A. Garcia
Numerical Prediction Of Transition Of The F-16 Wing At Supersonic Speeds - Final Report, Russell M. Cummings, Joseph A. Garcia
Aerospace Engineering
No abstract provided.
Numerical Prediction Of Transition Of The F-16 Wing At Supersonic Speeds, Russell M. Cummings
Numerical Prediction Of Transition Of The F-16 Wing At Supersonic Speeds, Russell M. Cummings
Aerospace Engineering
No abstract provided.
Computational Investigation Of Slot Blowing For Fuselage Forebody Flow Control, Scott M. Murman, Yehia M. Rizk, Russell M. Cummings, Lewis B. Schiff
Computational Investigation Of Slot Blowing For Fuselage Forebody Flow Control, Scott M. Murman, Yehia M. Rizk, Russell M. Cummings, Lewis B. Schiff
Aerospace Engineering
This paper presents a computational investigation of a tangential slot blowing concept for generating lateral control forces on an aircraft fuselage forebody. The effects of varying both the jet width and jet exit velocity for a fixed location slot are analyzed. This work is aimed at aiding researchers designing future experimental and computational models of tangential slot blowing. The primary influence on the resulting side force of the forebody is seen to be the jet mass flow rate. This influence is insensitive to different combination of slot widths and jet velocities over the range of variables considered. Both an actuator …
Bodner-Partom Viscoplastic Constitutive Model And The Non Linear Finite Element Analysis Of A Stress Concentration At High Temperature, Faysal A. Kolkailah, A. J. Mcphate
Bodner-Partom Viscoplastic Constitutive Model And The Non Linear Finite Element Analysis Of A Stress Concentration At High Temperature, Faysal A. Kolkailah, A. J. Mcphate
Aerospace Engineering
The design and analysis of structural components to operate at elevated temperature and severe stress levels, such as a low-cycle fatigue-limited jet engine disk, require an accurate prediction of the nonlinear stress-strain . response encountered during the cyclic loading conditions. Nonlinear analysis of such components is normally carried out by a finite element code making use of constitutive theories in which the material response is separated into the two important groups of phenomena known as rate dependent "creep" and rate independent "plasticity." A number of viscoplastic. constitutive theories in which "creep" and ''plasticity" effects are combined _into a unified plastic …
Numerical Simulation Of F-18 Fuselage Forebody Flows At High Angles Of Attack, Lewis B. Schiff, Russell M. Cummings, Reese L. Sorenson, Yehia M. Rizk
Numerical Simulation Of F-18 Fuselage Forebody Flows At High Angles Of Attack, Lewis B. Schiff, Russell M. Cummings, Reese L. Sorenson, Yehia M. Rizk
Aerospace Engineering
As part of the NASA High Alpha Technology Program, fine-grid Navier-Stokes solutions have been obtained for flow over the fuselage forebody and wing leading edge extension of the F/A-18 High Alpha Research Vehicle at large incidence. The resulting flows are complex, and exhibit crossflow separation from the sides of the forebody and from the leading edge extension. A well-defined vortex pattern is observed in the leeward-side flow. Results obtained for laminar flow show good agreement with flow visualizations obtained in ground-based experiments. Further, turbulent flows computed at high-Reynolds-number flight-test conditions (M∞ = 0.2, α = 30 °, and Re …
Numerical Representation Of Bodner Viscoplastic Constitutive Model, Faysal A. Kolkailah, Andrew J. Mcphate
Numerical Representation Of Bodner Viscoplastic Constitutive Model, Faysal A. Kolkailah, Andrew J. Mcphate
Aerospace Engineering
Nonlinear analyses of structural components are normally carried out by finite element codes making Use of constitutive theories in which the material response is separated into the two important groups of phenomena known as rate‐dependent “creep” and rate‐independent “plasticity.” A number of viscoplastic constitutive theories in which creep and plasticity effects are combined into a unified plastic strain model have recently been proposed and are still undergoing active development. In this paper, the constitutive equations of the Bodner‐Partom model are used to present the time dependent, inelastic properties of Inconel 718 at 650 °C. This representation covers a wide range …