Improving Aircraft Noise Predictions ConsideringFan Rotational Speed

A Comparison of Aircraft Tire Skid with Initial Wheel Rotational Speed Using Ansys Transient Simulation

Based on heavy aircraft main landing gear tires touchdown skidding process, patents have been registered since the 1940s to improve tire safety, decrease the substantial wear and smoke that results from every landing by spinning the rear wheels before touchdown. A single wheel has been modeled as a mass-spring-damper system using ANSYS mechanical transient simulation to analyze static and pre-r...

Speed of Aircraft

The velocity with which terrorists crashed the ill-fated planes onto the buildings on September 11, 2001 is an important parameter in any post-mortem analyses on the collapse of the buildings. As is well known, the kinetic energy carried by the planes changes with the square of the velocity, while their momentum grows in proportion to this velocity. Thus, an accurate determination of the speed ...

Beamforming-Based Wavepacket Model for Noise Environment Predictions of Tactical Aircraft

Jet noise consists of extended, partially correlated sources such that a single-wavepacket source representation is inadequate. A multiple-wavepacket (MWP) model provides an analytical framework for jet-noise-like radiation to simulate jet noise field levels as well as the corresponding spatial coherence properties within the field. Here, a beamforming method with regularization is applied to n...

Aircraft Measurements for Understanding Air-Sea Coupling and Improving Coupled Model Predictions

In FY14, the objectives of our analyses of the WP-3D based LASP measurements are to understand: 1) marine atmospheric boundary layer (MABL) structure and characteristics during the DYANMO/LASP field campaign; 2) influence of convection on MABL structure and the variability of atmospheric boundary layer thermodynamic properties across the DYNAMO domain during the suppressed and active phase of M...

Rotational Speed Sensors KMI15/16