Prof.Yuan Wang

College of Aerospace Science and Engineering,

National University of Defense Technology,

Hunan, Changsha 410073, People's Republic of China

Bio

Yuan Wang, Ph.D., Associate Professor. College of Aerospace Science and Engineering, National University of Defense Technology. 

She obtained her Ph.D. in Chemical Engineering from the University of Edinburgh in 2011 and joint NUDT ever since. Her research interests include engine thermal protection, icing and anti-icing, and heat and mass transfer in phase-change processes. She has published over 70 academic papers and has been authorized 17 national patents. She is selected for the High-level Innovative Talent Training Program of National University of Defense Technology.

Title

Interfacial Behaviors and Heat Transfer Enhancement of N-Decane-Based Nanofluids

Abstract

Regenerative cooling is a primary thermal protection approach for aerospace engine combustion chambers. The flow and heat transfer characteristics of the coolant determine the regenerative cooling performance. Therefore, it is necessary to improve the heat removal capacity of the coolant, which is normally the engine fuel. The addition of nano-particles is a solution. However, the properties and stability-related flow and heat transfer characteristics of fuel-based nanofluids are quite limited, which restricts their practical usage. In the present study, experiments are conducted to explore the stability and interfacial behaviors of n-decane-based nanofluids. The stabilities of different types of nanofluids are tested. The impacts of nanoparticle type, particle concentration as well as surfactant concentration on the solution stability are examined. The outcomes of the experiments are instructive for preparing the high heat removal coolant in the regenerative cooling system. Besides, the flow and heat transfer characteristics of decane-based nanofluids in minichannels are numerically simulated. The joint effect of the channel structure and the coolant properties are evaluated to find a more effective heat transfer enhancement strategy.