Keyword: Computational fluid dynamics

Briefs: Software

A numerical modeling tool allows for a better understanding of rotating detonation engines (RDEs).

Briefs: Mechanical & Fluid Systems

Lateral nozzle forces are known to cause severe structural damage during testing of any new rocket engine configuration under development. While three-dimensional computational fluid dynamics (CFD)...

Facility Focus: Nanotechnology

Established in 1943, Los Alamos National Laboratory (LANL) in New Mexico was site Y of the Manhattan Project for a single purpose: to design and build an atomic bomb, which took just 27 months. The Los Alamos...

Briefs: Software
Global Series Solutions of Nonlinear Differential Equations with Shocks using Walsh Functions

An orthonormal basis set is introduced for use in generating global solutions to nonlinear differential equations with shocks. By global, it is meant that a single series solution is generated that is valid over the entire domain, not a separate...

Articles: Manufacturing & Prototyping

Metal additive manufacturing is being embraced as a choice for parts production across many fields — including aerospace, automotive, healthcare, and other industries —...

Briefs: Aerospace

NASA’s Langley Research Center has developed aircraft flap tip modifications that reduce noise produced during approach and landing. The modifications are rigid open lattice (honeycomblike) and fin structures...

Briefs: Software
Robust Mesh Update Method for Grid Motion Problems

Over the past several decades, one class of problems in computational fluid dynamics (CFD) that has undergone substantial development involves movement of the fluid domain boundary. The problem class exists when the fluid domain boundary is either explicitly time-dependent, or is known a priori...

Briefs: Software
Efficient Two-Dimensional Solution Methods for the Navier-Stokes Equations

ARC2D is a computational fluid dynamics (CFD) program for two-dimensional airfoil and simply connected geometries. The program uses implicit finite-difference techniques to solve two-dimensional Euler equations and Navier-Stokes equations. It is based on the Beam and...

Briefs: Software
Pegasus 5.2 Software for Automated Pre-Processing of Overset CFD Grids

Pegasus software is used as a pre-processor for overset-grid Computational Fluid Dynamics (CFD) simulations. It provides the hole-cutting and connectivity information between structured overset grids. The main features of the software include automated hole-cutting...

Application Briefs: Electronics & Computers
Siemens PLM Software
Plano, TX
www.plm.automation.siemens.com

The use of lithium-ion (Li-ion) batteries has made the electric vehicle (EV) a...

Briefs: Software
PLOT3D 4.1

PLOT3D is an interactive graphics program designed to help scientists visualize computational fluid dynamics (CFD) grids and solutions. Today, supercomputers and CFD algorithms can provide scientists with simulations of such highly complex phenomena that obtaining an understanding of the simulations has become a major problem. Tools...

Briefs: Software
Generation of Cut- and Split-Cells for Face-Piercing Geometry in Embedded-Boundary Cartesian Methods

This innovation addresses several critical issues in the construction of cut control volumes using embedded-boundary Cartesian mesh generators. The innovation considers the case of a surface triangulation intersecting the face of a Cartesian hex...

Briefs: Aerospace
Nodal Averaging Program for CFD Planes

Aerodynamic heating of aerospace vehicles such as aircraft and spacecraft occurs when air passes over a vehicle during transit, ascent, descent, and re-entry, and is a function of re-entry angle, speed, air density, thermal protection system material, and vehicle configuration. The degree of aerodynamic...

Briefs: Mechanical & Fluid Systems
Interface Between STAR-CCM+ and 42 for Enhanced Fuel Slosh Analysis

Fuel slosh is excited during spacecraft maneuvers. The forces and torques exerted on the spacecraft by the slosh must be controlled by the attitude control system to maintain correct pointing and spacecraft orbit. In some rare cases, the attitude control system may excite the...

Application Briefs: Software

NASA researchers want to prove that a virtual reality headset like the Oculus Rift is not just a toy. Josh Kinne, a deputy project manager at NASA Langley Research Center, sees a future role for virtual and augmented...

Articles: Aerospace
Simulating the SLS Sound Suppression Water System

NASA’s next-generation Space Launch System (SLS) for deep space exploration consists of four RS-25 liquid rocket engines and...

Briefs: Software

NASA’s Langley Research Center engineers have developed a new software package for more facile computational fluid dynamics. The software’s fast user run time, robustness, and...

Briefs: Software

NASA’s Langley Research Center has developed unsteady aerodynamic Reduced-Order Models (ROMs) that significantly improve computational efficiency compared to traditional analyses of...

Briefs: Software
Mesh Adaptation Module for Cartesian Meshes with Embedded Boundaries

This work extends the mesh generation capability of NASA’s Cart3D flow simulation software package to permit cell-by-cell mesh enrichment. Cart3D allows users to perform automated Computational Fluid Dynamics (CFD) analysis on a complex geometry. It includes utilities for...

Briefs: Aerospace
Reynolds-Averaged Navier-Stokes Integration for Shock Noise (RISN)

Reynolds-averaged Navier-Stokes (RANS) Integration for Shock- Noise (RISN) is a computer program that evaluates acoustic analogies to predict jet noise. Jet noise is due to turbulence from the chaotic flow within the exhaust of a rocket or air-breathing jet engine. The source of...

Application Briefs: Aerospace
Tecplot 360 EX data visualization and analysis software
Tecplot, Inc.
Bellevue, WA
800-763-7005
www.tecplot.com

NASA chose Tecplot 360 EX for use in the...

Briefs: Materials
AeroHeating Tools (AHT) Suite

This suite of computer programs, called “tools,” is used to calculate local flow angles over damage sites in the Shuttle Orbiter Thermal Protection System (TPS). It provides a quick and easy way to compute cross flow angles over points of interest on the Shuttle Orbiter TPS.

Briefs: Information Technology
Data Parallel Line Relaxation Code (DPLR) Version 3.05

The Reacting Flow Environments branch at NASA ARC is interested in characterizing the aerothermal environment of three main classes of problem: planetary entry vehicles, reusable launch vehicles (RLVs), and arc-jet (or other ground test) flow simulations. Each of these problem classes has...

Briefs: Software
Method for Evaluating the Pneumatic Hammer Stability of a Fluid-Film Bearing Using CFD

This invention relates to a fluid film bearing and a process for evaluating pneumatic hammer instability. Based on the stability criteria, a method was developed using 3D CFD (computational fluid dynamics) evaluation dynamics to evaluate the onset of pneumatic...

Briefs: Aerospace
Method of Performing Computational Aeroelastic Analyses

When designing aerodynamic structures, it is important to understand if, and under what aerodynamic conditions, the structure will be stable and unstable. This is especially true if a structure is inherently flexible, such as a wing, where unstable response leads to oscillations of the...

Briefs: Aerospace

This invention relates to the design of optimal shapes of airfoils, such as turbine blades, operating in subsonic flow regimes. An airfoil, such as a propeller blade or a turbine vane or blade...

Briefs: Aerospace
Aircraft Wing Flap Noise-Reducing Fins

Two different modifications have been developed for the edges of aircraft wing flaps to reduce noise. Reactive Orthotropic Lattice Diffuser (ROLD) is a modification that consists of a honeycomb-like, interconnected structure added to the region of the flap that experiences the highest degree of...

Briefs: Information Technology
Geometry Manipulation Protocol for CFD Applications, V1.0

Geometry Manipulation Protocol (GMP) is a library that serializes data types between XML and ANSI C data structures to support computational fluid dynamics (CFD) applications. This library currently provides a description of geometric configurations, general moving-body scenarios...

Briefs: Software
Fully Implicit Ablation and Thermal Analysis Program, Version 3 (FIAT v3)

FIAT v3 simulates one-dimensional thermal energy transport through a multilayer stack of thermal protection materials, bonding materials, metallic or composite structures, air gaps, and/or insulations. The outer surface encounters aerothermal heating from hypersonic flow,...