The American Society of Mechanical Engineers (ASME) Fluids Engineering Division has presented Professor David Schmidt of the Mechanical and Industrial Engineering Department and three co-authors with ASME’s prestigious 2018 Lewis F. Moody Award for their paper on "Modeling Sealing in Transient Injector Simulations.” Among other innovations, the award-winning paper described groundbreaking research to create the first simulation of a multiple injection event.
ASME has presented the Moody Award annually since 1958. As the award plaque stated: "In testimony of the high regard of your associates and the deep appreciation of the society for your valued services in advancing the engineering profession." According to the ASME website, the award was given to an “outstanding original paper useful to the practice of mechanical engineering.” The 2018 Moody Award was presented at the ASME 2017 Fluids Engineering Division Summer Meeting.
In addition to Schmidt, the other award winners were first author Chinmoy Mohapatra, Gabriel Jacobsohn, and Eli Baldwin.
As Professor Schmidt noted, “The algorithm presented in this article will soon be commercialized by Convergent Science Inc., a software company in Madison, Wisconsin. I have been invited to give a keynote address at their fall user conference.”
As the abstract of the award-winning paper explained, “The early and late portions of transient fuel injection have proven to be a rich area of research, especially since the end of injection can create a disproportionate amount of emissions in direct injection internal combustion engines. A perennial challenge in simulating the internal flow of fuel injectors is the valve opening and closure event. In a typical adaptive-mesh CFD simulation, the small gap between the needle valve and the seat must be resolved with very small cells, resulting in extremely expensive computations. Capturing complete closure usually involves a topological change in the computational domain.”
The abstract went on to explain that “In this work we present a more gradual and easily-implemented model of closure that avoids spurious water-hammer effects. The algorithm is demonstrated with a simulation of a gasoline direct injector operating under cavitating conditions. The results include the first simulation of a multiple injection event known to the authors. The results show cavitation at low valve lift. Further, they reveal post-closure dynamics that result in dribble, which is expected to contribute to unburned hydrocarbon emissions.” (August 2018)