Heavy-Duty Diesel Combustion With Ultra-Low NOx and SOOT Emissions~A Comparison Between Experimental Data and CFD Simulations

Experiments were conducted with a single cylinder heavy duty research engine, based on the geometry of a Volvo Powertrain D12C production engine. For these tests the engine was configured with a low compression ratio, low swirl, common rail fuel injection system and an eight-orifice nozzle. The combustion process was visualized by video via an inserted endoscope. From the resulting images temperatures were evaluated with the two-color method. In addition, the combustion and emission formation were simulated using the multiple flamelet concept implemented in the commercial CFD code STAR-CD. The models used in this paper are considered state-of-the-art. The purpose of this paper is to demonstrate the possibilities offered by combining several methods in the evaluation of novel engine concepts. Therefore, results from the optical measurements, the CFD simulations and global emission experimental data were compared. Combining the methods shows a great opportunity to understand phenomena associated with new combustion concepts involving long ignition delay, low temperature, and ultra low emissions

GLOBAL DISTRIBUTED ENGINEERING STUDENT DESIGN TEAMS: EFFECTIVENESS AND LESSONS LEARNED

Twenty-first century engineering student professional skills require the ability to work effectively in multicultural, globally distributed teams. Chalmers University of Technology (Sweden) and Penn State University (USA) have formed a collaboration to provide studentswith an experience in this environment to start requisite skill development. The activity is anchored by a corporate supplied project with realistic open-ended design requirements. The students are expected to mimic the operation of a multinational corporate engineering team todevelop a design solution. The collaboration was initiated in September 2014 and launched in January 2015 with Volvo Group as the industrial partner. In addition to the traditional design experience outcomes, the learning objectives from a global perspective are to: (a) understandthe impact of engineering in a global, economic, environmental, and societal context; (b) understand cultural/ethnic differences and develop the ability to work sensitively with them; (c) learn to function effectively in multinational teams; (d) communicate effectively in English,regardless of team members first language; and (e) develop the ability to organize and deliver communication around the globe. The paper discusses the integration of academic protocols from each university, the logistics and operation of the global student teams. At completion of the program a critique was performed from various perspectives to assess effectiveness and capture lessons learned. A pre and post survey was given to the students to assess effectson intercultural communication from the interaction. The Volvo Group personnel who interacted with the teams and supervising instructors were asked to critically evaluate the program. All information pointed to a successful program whereby the students delivered technically sound design solutions and gained professionally through the global experience. The paper concludes with a discussion of the keys to success for such a globally distributeduniversity-corporate academic collaboration