Effect of Incoming Flow Disturbances on Junction Flow Dynamics and Heat Transfer
Abstract
?The objective of this work is to explore the fluid dynamics and heat transfer of turbulent junction flow that is subject to incoming disturbances, and use this to propose low-order models of the dynamic behavior. Junction flow occurs at the base of submarine appendages, around the fin-tube interface in a heat exchanger, and at the endwalls of turbomachinery components. The junction flow is highly unsteady and is responsible for high levels of pressure fluctuations and significantly increased local heat transfer rates, making it one of the most challenging configurations to accurately model. This work will provide a better understanding of the dynamic nature of the junction flow and possibly lead to the development of control schemes that take advantage of natural incoming disturbances. The understanding from this work will be applicable to many situations of interest to the Navy, including improved turbomachinery durability and performance, reduced noise generation on submarine appendages, and high-efficiency heat exchangers for thermal management of high-energy ship systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 20, 2016
- Source ID
- N000141512764
Entities
People
- Stephen Lynch
Organizations
- Office of Naval Research
- Pennsylvania State University
- United States Navy