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Harmonic Balance 소개 및 적용 사례
다단계 유체기계 유동 영역은 본질적으로 비정상 상태입니다. 블레이드 끝단의 와류나 익열간의 상호작용과 같은 비정상 유동 특성을 정확하게 잡아내기 위해서 열 분포와 기계적 성능을 올바르게 예측하는 것이 중요합니다. 이러한 불안정한 특성을 모델링 하는 것은 시스템의 과도 성향에 이해하는 데 도움을 주며 블레이드의 온도나 효율과 같은 시간-평균 값들을 정확하게 예측하는데 필요합니다. 일반적인 시간-전진 비정상 해석 방법은 때때로 엄청난 계산 비용을 수반합니다. Harmonic Balance 방법은 전통적인 시간-전진 방법의 계산 비용 중 극히 일부분 만으로도 비정상 유동 특성이나 익열간의 상호작용을 계산할 수 있습니다. 이번 온라인 동영상에서는 공개된 NASA/GE E3 터빈을 정상상태 해석과 Harmonic Balance 방법을 사용하여 분석한 결과들을 비교하도록 하겠습니다. E3 터빈은 모든 익열에 필름 냉각 홀이 있는 이단 터빈입니다. 발표자는 냉각 장치들중에서 블레이드 온도를 예측하기 위해 유동장의 비정상 특성이나 익열의 상호작용에 대한 모델링이 얼마나 중요한지를 보여줄 예정입니다. 본 연구는 몬트리올에서 열린 2015 IGTI Turbo Expo에 논문...
As the oil and gas industry adapts to the “lower for longer” market, reducing costs and improving the production and efficiency of drilling and subsurface activities takes on even greater importance. Considering the current climate of the oil and gas industry, simulations are especially essential to enable companies to come up with better designs, faster, and at a reduced cost. This online event will focus on the role of simulation in the design of drill bits, Inflow Control Devices or Valves (ICDs, ICVs), Electric Submersible Pumps (ESPs), and other down hole tools. The event, which will...
We are pleased to announce a complimentary workshop being held in the Metro Detroit area on a better powertrain design process. If you are a CFD user in the automotive industry and want to improve your productivity to discover better powertrain designs faster, or if you are just curious to see what CFD can do for you, this workshop will be beneficial. Sign up today!
If you develop products in support of oil & gas projects (subsurface, subsea, process & separation), and want to reduce development time and costs while improving performance, this workshop is for you.
•Analyze the VIV suppression of drilling risers with the use of marine fairing. •A free academic license of Star CCM+ was used to complete the work.
An adaptive discretisation for population balance equations is presented. The method is combined with the multiphase CFD code STAR-CCM+ of CD-adapco. In order to account for the multidisperse nature of the flow the dispersed phase is split into M size groups; from the modelling point of view each group is a separate phase in every aspect but the name. The groups move with their own velocities and exchange mass, momentum, and energy with other groups and with the continuous phase. Size of a group is not prescribed a priori, but calculated from an additional scalar equation. A special procedure...
Previously experimental methods or empirical knowledge laid the foundation for ship design. Performing a model test in a towing tank is time consuming and expensive. In addition to this, studying detailed effects in a laboratory proves to be difficult. The exponential growth in computer power allows engineers to use computers and software to solve Navier-Stokes equations using computational fluid dynamics (CFD). This method allows the engineers to test different models, in a time and cost-efficient manner. In this master thesis, a study of CFD codes to perform a resistance prediction on two...
Single Jet Cavity Fill of a Highly Viscous Fluid
Single jet cavity fill of a highly viscous fluid. Simulation was performed using Computational Rheology that targets problems where viscous and viscoelastic effects are dominant.
The v10.06 release features the introduction of Computational Rheology, a new engineering discipline in STAR-CCM+. Computational Rheology further expands the multidisciplinary scope of STAR-CCM+ and targets problems where viscous and viscoelastic effects are dominant. The types of applications that are now possible to solve are flow in static mixers, flow into containers, pumping slurries with significant heat generation, as well as extrusions and material processing.