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Now showing items 41-47 of 47
Hydrophobic coatings for film boiling based drag reduction on a torpedo model
(Massachusetts Institute of Technology, 2015)
Previous research has shown that porous, hydrophobic surfaces exhibit a dramatic reduction in critical heat flux (CHF), the amount of heat over a surface area required to initiate film boiling. Film boiling is characterized ...
Automation as a manpower reduction strategy in navy ships
(Massachusetts Institute of Technology, 2016)
Since the early 2000's, the US Navy has endeavored to decrease the Total Ownership Cost (TOC) of their ships through a decrease in Operating and Support costs. This led to a large-scale effort by ship program managers to ...
An automatic, multi-fidelity framework for optimizing the performance of super-cavitating hydrofoils using Gaussian process regression and Bayesian optimization
(Massachusetts Institute of Technology, 2018)
Computer automated design of complex physical systems is often limited by the computational resources required for the high precision solvers. Determining an optimum design necessitates high accuracy simulations due to the ...
Load bearing interface design for a pan-tilt mechanism for severe marine environments
(Massachusetts Institute of Technology, 2017)
The Naval Research Laboratory (NRL) requested the design of a two-axis gimbal device for the shipboard support of a sensor payload. Previous design efforts presented a low-mass two-axis (pan and tilt) machine. Vibration ...
New approaches to the integration of organizational maintenance and failure data during submarine maintenance planning
(Massachusetts Institute of Technology, 2019)
Planning for maintenance periods for U.S. Navy submarines is difficult due to schedule and cost constraints, operating cycles, and logistical concerns. Organizational maintenance and failure data is vital to understanding ...
Modeling brake specific fuel consumption to support exploration of doubly fed electric machines in naval engineering applications
(Massachusetts Institute of Technology, 2016)
The dynamic operational nature of naval power and propulsion requires Ship Design and Program Managers to design and select prime movers using a much more complex speed profile rather than typical of commercial vessels. ...
Analysis of consistently poor work estimates in U.S. submarine availabilities
(Massachusetts Institute of Technology, 2018)
The maintenance of a warship requires an involved combination of scheduling, funding, and execution. For one finite maintenance period, known as an "availability," a small setback in one of these areas can have a significant ...