Seminar "Key aspects in design and modeling of positive displacement machines"
ESTECO Academy proudly presents the seminar "Key aspects in design and modeling of positive displacement machines", organized by the University of Trieste, Faculty of Engineering and Architecture, to be held in Trieste on Friday, March 17th.
Andrea Vacca, associate professor at Purdue University specialized in fluid power technology, will introduce the participants into the most popular design for positive displacement machines for high-pressure applications.
The seminar will illustrate the following:
- The flow non-uniformity as the main source of noise emissions.
- The lubricating gaps as the main source of power loss due to leakage and fluid shear.
- The thermal-fluid-structure interaction modeling approach developed at Purdue University for the internal lubricating gaps.
- Several simple examples of virtual prototyping through software optimization.
The seminar is open both to students and researchers of University of Trieste, as well as to external visitors with free admission upon registration.
This seminar will first introduce the most popular designs for positive displacement machines for high-pressure applications. The most important aspects that determine the efficiency, the reliability and the level of noise emissions of each design solution will be illustrated. In particular, the non-uniformity of the port flow constitutes the main source of fluid borne noise, while the internal lubricating gaps present in all these units represent the most important source of power loss due to leakage and fluid shear. Pumps and motors for high-pressure applications often utilize pressure compensation techniques to achieve minimum gaps thicknesses while also avoiding contacts between internal parts.
The modeling of such internal lubricating interfaces involves the use of proper thermal-fluid-structure interaction modeling techniques to account for the effect of the material deformation and the viscous dissipation of the working fluid. The seminar will illustrate the main features of the simulation approach formulated by Dr. Vacca’ team at Purdue University (Fig. 1), along with validation against experimental results.
The last part of the seminar will present some significant examples of virtual prototyping, in which the simulation models previously introduced are used within properly designed optimization schemes to achieve the best desired performance.
Aula A (Giorgieri) Edificio C7 (ex-Macchine)
|09:15 - 09:30 AM||Introduction to the seminar by prof. Carlo Poloni|
|09:30 - 10:15 AM||Andrea Vacca: "Key aspects in design and modeling of positive displacement machines"|