Effects of intercooling and recuperation on turbofan engine performance
An overall performance simulation model of the intercooled recuperative aero-engine was built, and an overall performance simulation program was developed. Then, analysis of the effects of intercooling and recuperation on the thermodynamic cycle parameters and performance parameters of the turbofan engine can be carried out. The result indicates that the turbofan engine performance can be improved with the proper use of intercooling and recuperation. With the same thermodynamic cycle parameters, the thermal efficiency and the net thrust is larger, while the specific fuel consumption is lower. To gain the same performance, lower overall pressure ratio and lower bypass ratio can be chosen for the intercooled recuperative aero-engine.
New Environmental Friendly Aero Engine Core Concepts
Large investments have already been made in Europe and the US through R&T programmes and collaborations to reduce the negative environmental effects of aircraft use. Research is therefore providing the technologies to improve the performance of existing engine components.
Using Activity Theory in Developing Instructial Tools for Project Management Studies
Competence and skills of the project manager are significant to project success. The skills needed in project managersâ work cannot be learned only by reading the books or a lecture hall; one learns them by practice. Therefore, an important challenge for educational institutions is to develop pedagogical practices that allow students to participate in working life projects and to confront real-life problems. Project-based learning (PBL) offers a model that enables students to practice the skills and competences needed in working life projects by utilizing real-world work assignments in time-limited projects. Using PBL method alone does not necessarily guarantee learning result. In order to be successful, PBL method requires effective and competent supervision and guidance of students as well as appropriate tools for instruction. In this study the concepts from activity theory (AT) are applied to development tools for supervising project-based learning.