Advancing Computerized Wind-Loading Tests to the Next Level Hi-Res CFD for Wind Loading of Tall Buildings

Transcription

1 Advancing Computerized Wind-Loading Tests to the Next Level Hi-Res CFD for Wind Loading of Tall Buildings Nick Wirth, Founder, Wirth Research Rob Rowsell, Engineering Manager, Wirth Research

2

3 Wirth Research High Resolution CFD for Wind Loading of Tall Buildings CTBUH Innovation Awards

4 Company Overview Motorsport Built Environment Automotive Refrigeration Defence Commercial Vehicles 2017 Wirth Research Ltd.

5 Importance of Aerodynamics on Tall Buildings Wind loading : Affects construction cost Limits building height May require mass damping 2017 Wirth Research Ltd.

6 Wirth Research Aero Development Experience Model and full scale WTT supplemented with low res CFD CFD to WT correlation poor (25% hit rate) In house Hi Res CFD developed CFD to WT correlation good rising to near perfect (75% > 95%+ hit rate) Overall Aero development rate increased dramatically The more we spent on Aero, the more we won races and championships 2017 Wirth Research Ltd.

7 Motorsport What is the biggest factor to a race car chassis design success? Aerodynamics The more a team works on aerodynamics, the faster the car To prevent teams spending too much money the regulations limit the number of WT and CFD hours Teams would spend more time/money on aero if allowed 2017 Wirth Research Ltd.

8 Aerodynamic Range 2017 Wirth Research Ltd.

9 Aerospace Aircraft + UAV design Safety, fuel efficiency, weight, range all driven by aerodynamics 2003 Boeing commercial aircraft over 20,000 CFD runs The more Boeing spend on aerodynamics, the more efficient their aircraft are 2017 Wirth Research Ltd.

10 WR Experiences In every industry WR is involved in, the use of correlated CFD and physical experimental testing for aerodynamics, massively increases aerodynamic development and product innovation rate Wirth Research Ltd.

11 WR Experiences In every industry WR is involved in, the use of correlated CFD and physical experimental testing for aerodynamics, massively increases aerodynamic development and product innovation rate. A correlated CFD method for building wind loads would be a good thing 2017 Wirth Research Ltd.

12 What is Hi Res CFD? WR High resolution mesh Cutting edge scale-resolving LES-RANS hybrid turbulence models Mid Resolution High Resolution 2017 Wirth Research Ltd.

13 HPC and CFD Process >40Tflops of CFD specific HPC Dedicated to process development Cloud-based simulations for product development Automated CFD Processes 2017 Wirth Research Ltd.

14 Pedestrian Comfort

15 Hi Res CFD in the Built Environment Pedestrian Comfort Refrigeration & HVAC Natural Ventilation Airborne Pollutants Smoke Dispersion & Fire Routing Landscaping Master Planning Wind Driven Rain Wind Loading Façade Pressures Aeroelasticity 2017 Wirth Research Ltd.

16 SOM Fundamental Geometry Challenge 0 deg flow angle 90 deg flow angle

17 SOM IHFBB Correlation Challenge

18 SOM IHFBB Correlation Challenge Mean moment correlation Range of WT Results Hi-Res CFD

19 SOM IHFBB Correlation Challenge Peak moment correlation Range of WT Results Hi-Res CFD

20 Developing in Hi Res CFD Off body flow structures visualised Enhanced understanding of buildings aerodynamic environment

21 Developing in Hi Res CFD Full pressure map over every square millimeter of the building surface Pressure data every 10,000 th of a second 10KHz!!!

22 Developing in Hi Res CFD Boeing view 10 years ago! CFD CFD CFD CFD CFD

23 Hi Res CFD for Wind Loading Each ton of steel takes: Appx 10,000 kwh to produce 10,000 lbs CO2 emitted in production (2018) and costs about $4,000

24 Hi Res CFD for Wind Loading Each ton of steel takes: Appx 10,000 kwh to produce 10,000 lbs CO2 emitted in production (2018) and costs about $4, story skyscraper using 50,000 tons of structural steel, which takes: 500 MWh to produce 230,000 tons CO2 emitted $200M of steel

25 Hi Res CFD for Wind Loading Each ton of steel takes: Appx 10,000 kwh to produce 10,000 lbs CO2 emitted in production (2018) and costs about $4, story skyscraper using 50,000 tons of structural steel 500 MWh to produce 230,000 tons CO2 emitted $200M of steel 1% structural mass saving by improved aerodynamic design would lead to: 500 tons steel saving 5 MWh energy saving 2,300 tons CO2 less emissions $2,000,000 cost saving

26 Thank you for your attention!