30 credits – Development of Chemical reaction models in 3D CFD simulations for aftertreatment system

30 credits – Development of Chemical reaction models in 3D CFD simulations for aftertreatment system

Scania genomgår nu en transformation från att vara en leverantör av lastbilar, bussar och motorer till en leverantör av kompletta och hållbara transportlösningar.

Thesis project at Scania is an excellent way of making contacts for your future working life. Many of our current employees started their career with a thesis project.

Background:
Scania works continuously to develop internal combustion engines which can achieve low pollutant emissions and high efficiency. One effective way is using Selective Catalytic Reduction (SCR) as a part of the after treatment system, to reduce Nitrogen oxides (NOx). To create a better understanding of the next generation after treatment system at Scania, synergy effects between simulation and engine test must be investigated.

To create a better understanding of the complete after treatment system, overall NOx conversion performance must be modelled. By integrating chemistry equations into the 3D-fluid dynamics simulations NOx conversion and excess amount of Ammonia (NH3) can be calculated. This enables faster simulation iterations to support engine cell validation tests.

Target:
The target of this thesis work is to develop a methodology to automatically include the chemical reactions required for NOx Conversion and Ammonia slip analysis over the SCR. The purpose of the methodology is to be able to simulate a large number of different exhaust aftertreatment system layouts faster and with acceptable level of accuracy.

Assignment:
The focus of this thesis is to develop a method for implementing chemical reactions in 3D CFD simulation. The methodology must apply correct calibration of SCR-substrates as well as validation against experimental data.

The focus of this project is to:
  • Develop a method to automatically analyze NOx Conversion and Ammonia Slip.
  • Validate the method by comparing steady state and transient simulation against rig test.
  • Present and document the methodology.
Education:
Masters student in mechanical, chemical and physical engineering, or similar.

Number of students: 1
Start date: January 2019
Estimated time needed: 20 weeks

Contact persons and supervisors:
Kim Petersson NXPS, manager +468 553 82524
Zemichael Yitbarek NXPS, supervisor +468 553 80747

Application:
Your application should contain a covering letter, CV and transcripts.
Selections will be made throughout the application period.
Mer info
Område Stockholms stad
Yrkesroll Teknik & Ingenjör
Typ av anställning Heltid, Tillsvidareanställd
Hemsida http://www.scania.com
Sista ansökningsdag 30 nov (15 dagar kvar)

Om arbetsgivaren

Scania är en världsledande leverantör av transportlösningar. Tillsammans med våra partners och kunder leder vi övergången till ett hållbart transportsystem. Under 2017 levererade vi 82 500 lastbilar, 8 300 bussar samt 8 500 industri- och marinmotorer till våra kunder. Vi omsatte närmare 120 miljarder kronor, varav 20 procent utgjordes av servicerelaterade tjänster. Scania grundades 1891 och finns idag representerat i mer än 100 länder, och har drygt 49 000 medarbetare. Forskning och utveckling är koncentrerad till Sverige, med filialer i Brasilien och Indien. Produktion sker i Europa, Latinamerika och Asien, med regionala produktcentra i Afrika, Asien och Eurasien. Scania ingår i Traton Group. För ytterligare information, besök www.scania.com.