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Presented at the STAR Global Conference 2012
Presented at the STAR Global Conference 2012 One of the major reasons for lower efficiency and higher unburned hydrocarbon and carbon monoxide emission for two stroke engine is short circuit losses that occur during the scavenging process. An attempt has been made in this study to understand and improve this phenomenon. A three dimensional transient CFD model is developed for a schnullar type 70 cc two stroke engine. The engine is installed in a small moped used for personal transport and load carrying. Three major processes, namely blow down (expansion), scavenging and compression have been...
Presented at the STAR Global Conference 2012
Presented at the STAR Global Conference 2012
Presented at the STAR Global Conference 2012 As CFD is being embraced by the frame, wheel and component manufacturers in the cycling industry, some practical challenges are quickly emerging. Discussions and concerns regarding the scope and resources required to conduct CFD studies, as well as their relevance, are quickly evolving - a phenomenon which is not unique to the cycling community. In this presentation we will outline a process, that can effectively help to manage CFD in the overall design process by directly addressing data management and workflow issues. Particularly we see a...
Presented at the STAR Global Conference 2012 The presentation will be divided in the following sections: 1. Cervélo in the past A brief history of how Cervélo performed the aerodynamic analysis of bikes, such as the P4. The primary tool was the wind tunnel, a time consuming development phase, yielding good quantitative solutions but no qualitative solutions. A summary of development time and resources will also be included. 2. CFD Benchmarking Prior to the development of the replacement of the P4 time trial bike it was necessary to make sure that STAR-CCM+ provides the correct results in both...
Presented at the STAR Global Conference 2012 Spray drying has been used for more than a century, and from the outside, can seem to be a rather simple process. However, in contrast to the deceptive first appearance, the physical processes found inside a spray dryer are far from trivial and, as yet, are not fully understood. Therefore the spray drying process is still receiving active attention both from academia and industry. As an equipment supplier, Tetra Pak expends considerable effort to improve their spray dryers, enabling customers to make better powders at lower cost. CFD was recognised...
Presented at the STAR Global Conference 2012 The main purpose of an ART-XC telescope with X-ray optical system (Astronomical Roentgen Telescope - X-ray Concentrator) is to search space under a hard X-ray range to solve scientific problems within limits of “Spectrum-RG” experiment. One of the major requirements for the telescope is to ensure minimal thermal deformation of the construction from solar radiation and heating effect of spacecrafts in orbital flight. Therefore, a detailed computer simulation of temperature conditions and thermal deformation of telescope parts in outer space is...

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