Dissertation/Thesis Abstract

Parametric Study of Sealant Nozzle
by Yamamoto, Yoshimi, M.S., California State University, Long Beach, 2017, 63; 10604443
Abstract (Summary)

It has become apparent in recent years the advancement of manufacturing processes in the aerospace industry. Sealant nozzles are a critical device in the use of fuel tank applications for optimal bonds and for ground service support and repair. Sealants has always been a challenging area for optimizing and understanding the flow patterns. A parametric study was conducted to better understand geometric effects of sealant flow and to determine whether the sealant rheology can be numerically modeled. The Star-CCM+ software was used to successfully develop the parametric model, material model, physics continua, and simulate the fluid flow for the sealant nozzle. The simulation results of Semco sealant nozzles showed the geometric effects of fluid flow patterns and the influences from conical area reduction, tip length, inlet diameter, and tip angle parameters. A smaller outlet diameter induced maximum outlet velocity at the exit, and contributed to a high pressure drop. The conical area reduction, tip angle and inlet diameter contributed most to viscosity variation phenomenon. Developing and simulating 2 different flow models (Segregated Flow and Viscous Flow) proved that both can be used to obtain comparable velocity and pressure drop results, however; differences are seen visually in the non-uniformity of the velocity and viscosity fields for the Viscous Flow Model (VFM). A comprehensive simulation setup for sealant nozzles was developed so other analysts can utilize the data.

Indexing (document details)
Advisor: Minaie, Bob
Commitee: Whisler, Daniel, Yoozbashizadeh, Mahdi
School: California State University, Long Beach
Department: Mechanical and Aerospace Engineering
School Location: United States -- California
Source: MAI 56/05M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Mechanics, Mechanical engineering, Materials science
Keywords: Air entrapment, Flow analysis, Fluid dynamics, Sealant nozzle, Star-CCM+
Publication Number: 10604443
ISBN: 9780355230246
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