Algeria, April 25, 2018

See how easy it is to deform meshes and perform shape
optimization in MATLAB and join our webinar.

Description:

 

Theme: Moving Meshes and Shape Optimization 

 

When: April 25th (Wednesday) 1:00 pm EDT | 10:00 am PDT 

 

Schedule: 

 

-(p,e,t) data format for storing mesh – explanation 

-flow driven by mesh motion – peristaltic pipe example 

-shape optimization of NACA0012 airfoil 

-Q&A session 

 

Presenter: Wojciech Regulski – co-founder of QuickerSim  

Ltd. He is an expert in CFD and an ardent proponent of use  

of fluid mechanics in engineering design. 

 

 

Daikin Applied of Minneapolis, Minn, a fortune 1000 company and the largest heating, ventilation, air conditioning (HVAC), and refrigeration company in the world developed a new, ultra-efficient compressor design potentially capable of achieving multimillion dollar performance gains by using TURBOdesign Suite. Turbomachinery design engineers and original equipment manufacturers (OEMs) worked to achieve higher performance levels to meet U.S. and international efficiency standards can take advantage of the 3D inverse design software system, TURBOdesign Suite.

In general, one point of efficiency gain equates to about $1 million (U.S.) of profit," says Guy Phuong, Development Engineer at Daikin Applied. "Daikin Applied’s target performance gain for this project using the TURBOdesign Suite software is 2.5 points of efficiency gain. We already have achieved more than a two-point compressor efficiency improvement."

The HVAC system represents a large percentage of a building’s energy use. Since the 1980s, manufacturers of HVAC equipment like Daikin Applied have worked to make their systems more efficient. This was originally driven by rising energy costs and therefore customer demand. It was mandated by governmental standards like those set by the U.S. Environmental Protection Agency Engine Testing Regulations and Europe’s Ecodesign Directive. There are several methods for making HVAC systems that meet or exceed new standards, including making individual components such as air conditioning system compressors more efficient.

"Our 3D inverse design optimization technology provides innovative solutions while reducing development time and costs," said Professor Mehrdad Zangeneh, founder and managing director of ADT. "By using the TURBOdesign Suite, Daikin Applied engineers were able to apply the 3D inverse design approach to directly use knowledge of detailed fluid dynamics, as provided by computational fluid dynamics (CFD) and detailed measurements, to arrive at a breakthrough solution that met efficiency goals."

In the 3D inverse design approach enabled by the TURBOdesign Suite, the blade geometry is computed for a given pressure or loading distribution. Since 3D pressure distribution controls the viscous behaviour of the flow, by controlling the 3D pressure field, it is possible to directly use the detailed information provided by CFD solutions to arrive at a choice of optimum loading and control particular sources of performance loss in turbomachines. Read the case study in full.

Inverse Design offers a means by which turbomachinery designers can produce breakthrough designs in short order with lower costs. Our joint webinar with ASME: Maximizing Turbomachinery Performance with Inverse Design led by industry experts on the 24th of April will enable viewers to understand:

How TURBOdesign's Inverse Method is applied to modern turbomachinery design How Inverse Design addresses some of the key challenges facing turbomachinery manufacturers today The key steps needed to maximize the performance and efficiency of a design How to optimize designs using TURBOdesign Suite and how TURBOdesign links with analytical tools such as ANSYS and Star-CCM+ How Daikin Applied has used TURBOdesign Suite to optimize their chiller compressor designs for dramatically higher efficiencies and breakthrough performance

Flow Science has announced the speakers for its 2018 FLOW-3D European Users Conference, which will be held at Le Méridien Stuttgart Hotel in Stuttgart, Germany on May 14 – 16, 2018. The conference will be co-hosted by Flow Science Deutschland.

Customers who use the FLOW-3D product suite as the basis for innovative research and development will present their work, including topics such as additive manufacturing and foaming applications, sediment transport modeling, centrifugal casting processes, cryogenic tank flows, and flow in a peristaltic pump. Speakers from Pöyry Energy GmbH, Roche Diagnostics GmbH, ArianeGroup GmbH, Mott MacDonald, EDF-CIH, Österreichisches Gießerei-Institut, JBA Consulting and Endurance Overseas are part of a diverse lineup of presenters. Additionally, Flow Science’s senior technical staff members will present current and upcoming developments for the FLOW-3D product suite. A full list of speakers and their topics is available at: https://www.flow3d.com/speakers-announced-for-the-2018-flow-3d-european-users-conference/

Advanced training will be offered on Monday, May 14. Attendees can choose from two tracks: Metal Casting and Water & Environmental. The Metal Casting track, taught by Dr. Matthias Todte of Flow Science Deutschland, will focus on best practices for setting up models and interpreting results, including defect identification. The Water & Environmental track, taught by John Wendelbo, Director of Sales at Flow Science, will explore many facets of a real-world fish passage case study.

Flow Science’s HPC partner, Penguin Computing will participate as a conference sponsor. Penguin Computing is a leading developer of open, Linux-based HPC, enterprise data center and cloud solutions, offering a range of products from Linux servers to integrated, turn-key HPC clusters.Penguin Computing on Demand (POD) offers HPC accelerated time-to-solution without the complexity and expense of owning a cluster. Penguin Computing can be found online at https://www.penguincomputing.com/

More information about the conference, including online registration, can be found at: https://www.flow3d.com/2018-flow-3d-european-users-conference/

DO YOU WISH TO CARRY OUT REACTIVE FLOW SIMULATIONS AT AN AFFORDABLE CPU COST?

Join us for this free seminar and discover:

• The ease-of-use of NUMECA's software for combustion modeling
• The tabulated chemistry models that make the software very efficient for industrial applications (gas turbine combustors, furnaces, boilers, etc...)
• The Flamelet Generated Manifolds (FGM) technique which allows to simulate all combustion regimes from non-premixed to premixed combustion. Computationally efficient and more reliable predictions.

Key benefits:

• Learn from and discuss with experts from Europem, industry leader in converting waste into energy
• Get hands-on FINE^™/Open with OpenLabs experience
• Run CFD simulations on the Cloud and get high-accuracy results in minimum time thanks to FINE^™/Open (powered by Ubercloud and CPU 24|7)

This Seminar is organized in cooperation with NUMECA Ingenieurbüro.

Date: Tuesday May 8th, 2018 from 09:30am to 4:00pm

Venue: MELIA Düsseldorf, Inselstraße 2, 40479 Düsseldorf, Germany

Don’t miss out! Registration for the workshop is free but mandatory and space is limited.

REGISTER HERE

Agenda

09:30 Registration and Coffee

10:00 Welcome & Introductions

10:10 Numeca meshing tools for combustion model preparation

10:50 Break

11:15 Demo: Fully automated mesh generation for aircraft engine combustion chambers

12:00 Lunch

13:00 Efficient RANS and manifold modeling of industrial combustion processes with Numeca

13:30 Customer Presentation: Europem, Cosmin Katona

14:00 Break

14:15 Hands-on session: combustion model set-up and post processing

16:00 Wrap-up & Close

The following new or updated CFD jobs have been posted in the  

CFD Jobs Database since last week (Sun, Apr 8, 2018):  

 

#15042: PhD Position on regional climate modelling for wind farms 

       KU Leuven, PhD Studentship 

       Belgium, Leuven 

 

#15041: PhD Position on two-way meso–micro coupling 

       KU Leuven, PhD Studentship 

       Belgium, Leuven 

 

#15040: Postdoctoral position in CFD analysis of Air Cavity Ships 

       Chalmers University of Technology, PostDoc Position 

       Sweden, Gothenburg 

 

#15039: Complex intake aerodynamic design and optimisation with DSTL 

       Cranfield University, PhD Studentship 

       United Kingdom, Bedfordshire, Cranfield 

 

#15038: Mesh Generation Engineer 

       NUMECA International, Job in Industry 

       Belgium, Brussels 

 

#15037: CAE Software Framework Development Support Engineer - Advanced 

       Siemens Industry Software Computational Dynamics Ltd, Job in Industry 

       United Kingdom, London 

 

#15036: PhD Studentship - Metastability of Geophysical Turbulent Flows 

       Aston University, Mathematics Department, PhD Studentship 

       United Kingdom, Birmingham 

 

#15035: Diesel Engine Performance Modeling and Development Engineer 

       PACCAR Technical Tencer, Job in Industry 

       United States, WA, Mount Vernon 

 

#15034: Aeroacoustics of rotors at low Mach numbers 

       ISAE-Supaero / DGA, PhD Studentship 

       France, Toulouse 

 

#15033: Student Intern (Praktikant/in)-Master Thesis (Masterarbeit) 

       Gardner Denver Schopfheim GmbH, Diploma Work 

       Germany, BW, Schopfheim 

 

#15032: Year in Industry placement 2018/19 

       Malvern Panalytical, Job in Industry 

       United Kingdom, Worcestershire, Malvern 

 

#15031: Scientific Programmer (m/f) for High Performance Computing 

       Deutsches Klimarechenzentrum GmbH, Job in Academia 

       Germany, Hamburg, Hamburg 

 

#15030: Postdoctoral Fellow in Nuclear Engineering Department 

       Khalifa University of Science and Technology, PostDoc Position 

       United Arab Emirates, Abu Dhabi, Abu Dhabi Island 

 

#15029: Technical Professional - CFD Specialist 

       Halliburton, Job in Industry 

       India, Maharashtra, Pune 

 

#15028: Postdoc in CFD simulation of multiphase reactive flow 

       Luleå University of Technology, Job in Academia 

       Sweden, Luleå 

 

#15020: PostDoc in FSI for Heart Flow Simulations 

       University of Wyoming, PostDoc Position 

       United States, Wyoming, Laramie 

 

#14994: Computational Wind Engineering - University of Bologna 

       University of Bologna, Job in Academia 

       Italy, Bologna 

 

#14897: Numerical Simulation of Fluid Mechanics 

       CORIA - CNRS, PostDoc Position 

       France, Normandy, Rouen 

 

To learn more about these jobs please visit the CFD Jobs Database at https://www.cfd-online.com/Jobs/ 

 

Frequent changes in the operating modes pose significant challenges in the development of a pump-turbine with high efficiency and stability. In the current publication on Investigation on Flow Characteristics of Pump-Turbine Runners With Large Blade Lean in the Journal of Fluids Engineering, two pump-turbine runners, one with a large positive blade lean and the other with a large negative lean, are investigated numerically and experimentally. These two runners are designed by using the optimum stacking condition at the high pressure edge (HPE). The experimental and the numerical results show interesting outcomes on efficiency performances and pressure fluctuations. The internal flow field analyses clarify the effects of the blade lean on the pressure distribution around the runner blades. In the turbine mode at partial load, the negative blade lean can control flow separation in the high pressure side of the runner and then reduce the pressure fluctuations in the vaneless space.

Pumped storage power stations are experiencing rapid development in China with the increasing development of smart grid and extensive development of nuclear and wind power stations for renewable energy. As a key component of the mechanical part of pumped storage power stations, the reversible pump-turbine has the function of water pumping and electricity generation as the load varies in the electricity grid. High efficiency, no cavitation, and good stability are important standards to evaluate the performance of a pump turbine unit. Compared with the efficiency and cavitation, it is difficult to evaluate the hydraulic stability due to its unstable characteristics in the design stage.

Hydraulic stability in a pump-turbine has become more and more prominent with the increase of the pump-turbine’s capacity. In the pump-turbine, pressure fluctuations may arise from system instabilities generated by a combination of pump-turbine runner’s S-shape characteristic and a hydraulic system or due to flow instabilities, such as vortex shedding, rotating stall, draft tube vortex, and so on. These pressure fluctuations can induce mechanical vibrations and even premature mechanical failures.

It has been recognized that pressure fluctuations in the space between runner blades and guide vanes are the most detrimental to hydraulic stability. The space between the runner blades and the guide vanes is usually referred as the vaneless space. It has been shown that within the vaneless space, rotor–stator interactions (RSI) are the primary cause for the pressure fluctuations in the turbomachinery.

Many experimental and numerical studies have been made on pressure fluctuations in both model and prototype pump turbines. Near the best efficiency point (BEP) for both the turbine and pump modes, the amplitudes of pressure fluctuations are low and the dominant frequency was blade passing frequency. At off-design conditions, amplitudes of the pressure fluctuations increased and low frequency components occur due to the unsteady vortex formation in the runner and/or guide vanes. The alternate vortex formation leads to unsteady momentum exchange between runner blades and guide vanes and is accordingly associated with pressure fluctuations.

Many studies have been done on the RSI’s mechanism and characteristics in pump-turbines. However, few investigations have been made in the design stage to reduce the pressure fluctuations and their unsteadiness. Larger vaneless space and higher height of the guide vanes can bring down the pressure fluctuations in the vaneless space.

However, these parameters inevitably affect the efficiency of the pump-turbines. Leaned blades have been used extensively in turbomachinery over the last couple of decades. The main effect of the blade lean is to introduce a spanwise blade force, and then the loading distribution on the blade surface is changed. Blade lean can be used as a powerful tool to control blade loading, discharge angle, and mass flow distribution along the span. It has been noticed that the lean at the high pressure edge (HPE) on the runner can disperse the flow impact between the guide vanes and the runner blades in the pump-turbine.

In this paper, two reversible pump-turbine model runners, one with a big positive blade lean and the other with a big negative blade lean, are investigated. Both experimental measurements and numerical simulations are made for these two runners. The characteristics of efficiency and pressure fluctuations are presented and the effects of the blade lean angles on the internal flow field are discussed. The results offer guidance to reduce the pressure fluctuations in the pump-turbines while maintaining higher efficiency.