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Using multiphysics simulation to reduce airport noise challenges
Airport noise regulations have tightened in the last decade, making it ever more difficult to operate in urban environments. At the same time, the demand for air travel has been growing. Airport airframers have been searching for ways to reduce the level of perceived noise caused when aircraft land. To that end, innovative companies like ATA Engineering recently demonstrated a prototype aircraft drag management device called an engine air-brake (EAB) in a series of ground tests. The EAB uses a deployable swirl vane mechanism to switch the operation of a turbofan’s exhaust stream from thrust...
网络研讨会: 设计能够应对气候挑战的船只——船舶设计的典范转变
海洋产业的诸多企业越来越意识到,应对气候变化需要联合行动,市场格局的竞争愈演愈烈,如要生存下来并持久繁荣昌盛,迫切需要开发新的创新型产品和业务模式。 受油价下跌和全球经济颓势的影响,不论是新起之秀还是老牌企业都一致认为,成败的关键取决于如何适应并从容应对这些异动。 本网络研讨会将介绍如何以新颖详尽的方法利用仿真帮助海洋产业企业实现创新目标,从而达成企业目标。利用仿真技术自动探索设计空间不仅可帮助企业提高生产力,而且还可帮助工程设计人员聚焦创新设计,从而继续创造出更好的船舶性能以及凸显其竞争优势。 我们将通过采用基于仿真技术的方法来优化商业船只的初始设计以演示这一转变设计优化将考虑到不同的航行条件以及推进器设计。 这种方法将展示现实世界基于仿真技术的初始设计,还将演示如何从设计流程的最初阶段应用宝贵的研究。
Propellers
Simulating the rear propellers of the Titanic
When you ask anyone to name a famous ship, the answer is usually “the Titanic.” Sure, there are other contenders depending on what part of the world you come from, but none left their mark on the wider public’s consciousness - or indeed continues to hold it - some 105 years since she sunk this coming April 15. In conversation with some colleagues the question was posed “I wonder if anyone’s ever really looked into simulating the Titanic?” There are computer animations, but this is not simulation. From a brief scan of the internet it seemed that this perhaps wasn’t the case. There are quite a few attempts at hand calcs to work out the physics involved, and plenty of debate about the precise nature of what happened with the propeller cavitation or the rudder being too small. But with the current set of computational tools available to engineers these days, specifically computational fluid dynamics (CFD), I thought it would be interesting to look back on the most famous ship of all time in STAR-CCM+ and what I learned was not exactly what I was expecting, but more on that later.
Thermal Stress in Electronics
Mechanical stress is a key failure mechanism to consider when designing electronics systems. Excessive mechanical stress can cause cracking, rupture, fatigue, delamination, or even excessive deflection (such as in optical assemblies). Since most electronics systems are not also designed to be a part of the main mechanical load bearing structure, thermal expansion is a primary source of mechanical stress. CTE (coefficient of thermal expansion) mismatch typically comes to mind when discussing thermal stress, but high-temperature gradients also can cause differential expansion and excessive...
Using cutting-edge CFD for production type ship design evaluation and optimization
Ship performance has become more important than ever in a market where operating margins are low and emissions regulations are tightening. Ship owners are often required to make quick decisions about design changes or modifications which affect performance. In this regard, rapid turnaround time is just as important as accuracy in order to meet the tight deadlines often present in a ship design project. In order to meet this challenge, ABS' Energy Efficiency CFD team has developed an automated system which allows CFD simulations to be run much faster than traditional wisdom would suggest. This...
旅客機の環境制御システムの性能向上における設計探査の活用事例
近年の旅客機の環境制御システム(ECS)には、 航空機 性能を確 実にするために 複雑かつ相互に関連したシステムが多数含まれています。これらのシステムは燃 費に大きく影響するため、エネルギー効率を向上させつつ客室内の快適性を維持 する必要に迫られています。 一例として、客室内の与圧・空調と 航空機 の防氷装置への熱気の供 給のためのエ ンジン抽気の使用があります。これらのシステムに適 切な温度の空気を供給する ために、高温のエンジン抽気はエンジン バイパスからの冷気と混合されます。 エンジン抽気とバイパス空気 の均一な混合はシステムの性能を維持するために 極めて重要であり 、その温度はセンサを介して監視されます。 本ウェビナーでは、先進的な企業や組織が設計探査をどのように活 用しているか を、スタティックミキサーのパラメトリック最適化の 事例を通して説明します。 シミュレーションと設計空間の探索にOptimate+™ソフト ウェアを介して STAR-CCM +®ソフトウェアを利用する方法をご紹介します。 
Desenvolvimento Virtual para Engenharia da Mobilidade: Simulações avançadas de CFD para “Water Management”
A Globalização, transformações demográficas e mudanças climáticas tem definido as tendências para os projetos globais de veículos e causado impactos no futuro da mobilidade. Seguindo as variações climáticas, os projetos atuais necessitam atender normas rígidas e requisitos de performance e qualidade no que diz respeito ao comportamento do escoamento da água da chuva ao redor do veículo e situações de enchentes comuns em países tropicais como o Brasil. Esta área de estudo, comumente chamada “Water Management” tem enorme importância no desenvolvimento do veículo em diversas situações, tais como...
Desenvolvimento Virtual para Engenharia da Mobilidade: Simulações avançadas de CFD para “Water Management”
Globalização, transformações demográficas e mudanças climáticas tem definido as tendências para os projetos globais de veículos e causado impactos no futuro da mobilidade. Seguindo as variações climáticas, os projetos atuais necessitam atender normas rígidas e requisitos de performance e qualidade no que diz respeito ao comportamento do escoamento da água da chuva ao redor do veículo e situações de enchentes comuns em países tropicais como o Brasil. Esta área de estudo, comumente chamada “Water Management” tem enorme importância no desenvolvimento do veículo em diversas situações, tais como:...

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