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Validation of an Unstructured Overset Mesh Method for CFD Analysis of Store Separation
Stage separation of a Delta Launch Vehicle using Overset Mesh. Animation shows the pressure gradients along a center plane section as the stages separate.
The Crescendo model is a simplified version of a helicopter turbine. With the use of Surface Wrapper and the CHT capabilities of STAR-CCM+, engine cooling of the model can be accurately analyzed. Image shows thermal contours on the turbine and the polyhedral mesh on the surface.
Increase Productivity by Closing the Gap Between CAD and Analysis with Automated Workflows
Dealing with the consequences of imperfect CAD has long been one of the biggest bottlenecks in CFD. Furthermore, reducing the costly process of manual CAD clean-up ensures an engineer's valuable time is instead spent gaining insight into product behavior and performance. This webcast demonstrates how to: Use a fully parametric 3D-feature based modeler to easily create and modify your own geometries Use automatic bi-directional geometry updates between CAD and simulations during the optimization process to facilitate Multidisciplinary Design Exploration (MDX) Eliminate manual repair from the...
STAR-CCM+/Abaqus Co-simulation of wing tip flutter
STAR-CCM+/Abaqus Co-simulation of wing tip flutter
Brno University of Technology The paper deals with instigation of influence of air duct geometry on air jet direction in aircraft cabin ventilated by mixing ventilation. CFD approach was used for investigation and model geometry was based on small aircraft cabin mock-up geometry. Model was also equipped by nine seats and five manikins that represent passengers. The air jet direction was observed for selected ambient environment parameters and several types of air duct geometry and influence of main air duct geometry on jets direction is discussed. The model was created in StarCCM+ ver. 6.04...
German Aerospace Center, Institute of Aerodynamics and Flow Technology Aerodynamic noise generated by the low Mach number flow in an air cabin intake is investigated numerically. For analysis a realistic intake installed DLR's cabin test facility Do728, was chosen. Two independent approaches were used. First, the so called hybrid approach, based an incompressible simulation of the airflow in the intake and Lighthill aeroacoustical analogy was applied, which separated generation and propogation of sound. The flow field was calculated with OpenSource code OpenFOAM and acoustical sources and...
This paper presents an approach to characterize the noise produced by an air vent of the Environmental Control System (ECS) for a regional transportation aircraft. The analyses have been conducted for different values of inlet mass flow rate on 2-D and 3-D models. Noise computations have been made in different points of control volume (Receivers) to better predict the volume distribution of sound pressure. The Ffwocs Williams – Hawkings model has been used for aero-acoustic analysis which is based on the Lighthill acoustic analogy generalized with the inclusion of moving surface. The k-ε...
The design of a long endurance electric UAV is presented. The mission requirements are derived from civilian surveillance applications, such as forest, coast or border patrol. As such, long endurance is desired, which is tackled by a careful lightweight airframe design and an electric propulsion system assisted with solar cell arrays. The main steps of the design are covered, including numerical simulations, as well as construction, component and systems testing and flight testing. The feasibility of a green, low cost, small footprint UAV is demonstrated.
Joby Aviation One promising solution in the search for a quiet, efficient VTOL aircraft configuration employs two-blade rotors which lock into a fixed position during horizontal flight, becoming lifting surfaces. The design of these blades and their integration onto an airframe pose many challenges, including performing this blade repositioning with a mechanism that is adequately simple, reliable, lightweight, and aerodynamic; determining a blade geometry that strikes the right compromise between performance as a rotor blade and as a wingtip; and providing sufficient pitch and yaw control in...

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