Performance of two different waste heat recovery systems (one based on Rankine cycle and the other one using thermoelectricity) combined with non-hybrid, mild-hybrid and full Continue reading
Rubber is a highly complicated material. Its properties are strongly dependent of temperature, preload, frequency, amplitude and Continue reading
The work reflected in this study includes a detailed study of co-flow jet (CFJ) technologies as they are applied to a typical thin airfoil, NACA 6415, at take-off and landing speeds. Numerical analysis and experimental testing were conducted on Continue reading
Many modeling studies have been carried out to simulate the current distribution across the channel and shoulder direction in a proton exchange membrane (PEM) fuel cell. However the modeling results do not show Continue reading
Carbon fiber is an emerging material in electrical and electronics industry. It has been used as contact in many applications, such as switch, potentiometer, and commutator brush. A new technique of electronics interconnect is developed, with Continue reading
Limited data on jet fuel ignition and oxidation at low-O2, vitiated conditions has hindered the validation of kinetic models for combustion under such conditions.
In this study, ignition delay time experiments of JP-8 have been performed with Continue reading
Low vibration levels are a critical objective in automobile exhaust system design. It is therefore important for design engineers to be able to predict, describe and assess the dynamics of various system design proposals during Continue reading
Hypersonic vehicles, based on scramjet engines, have the potential to deliver inexpensive access to space when compared with rocket propulsion. The technology, however, is in its infancy and there is still much to be learned from fundamental studies.
Flows that represent the conditions inside a scramjet engine can be generated in ground tests using a free-piston shock tunnel and a combustor model. These facilities provide a convenient location for Continue reading
Nanofluidics has been a major field of research for application in areas like single molecule detection. Most of the research efforts have been concentrated in developing novel Continue reading
Often complex molded parts include undercuts, patches on the part boundaries that are not accessible along the main mold opening directions. Undercuts are molded by incorporating side actions in the Continue reading
The problem of automating design processes is often related to the difficulties with updating, maintaining and sharing the information. This thesis provides a descriptive case study of a large company’s design automation process and the difficulties of Continue reading
Most aircraft component are currently being manufactured by machining, forging, welding and also assembling such parts. However, the possibilities of cutting cost from a single component has brought about a growing trend towards looking into casting as a possible option for manufacturing aircraft parts. Continue reading
Two ways in which the concept of open resonator can be used in connection with nondestructive evaluation will be described.
In the first, a noncontact transducer’s efficiency of transferring energy into an object can be increased by Continue reading
Direct numerical simulation (DNS) of steady flow, with Re = 750 at inlet, through stenosed pipe has been done to study transition and turbulence of the flow in the post-stenosis area. The pipe has 75% Continue reading
One of mankind’s most important needs is the need for shelter. All around the world people live in lack of this basic need. Colombia is a South American country heavily burdened by Continue reading
A manually operated paper-recycling machine was designed and fabricated. This was done to enable waste paper conversion into useful product. The fabricated plant consists of Continue reading
Rotary machinery systems are widely used in different industries. As they have rotational movements, the resonances will be the function of rotational speed. Nowadays, there are different Continue reading
Piezoelectric materials can be used as a means of transforming ambient vibrations into electrical energy that can be stored and used to power other devices. With the recent surge of micro scale devices, piezoelectric power generation can provide Continue reading
In Sweden close to 500 people are killed and several thousands severely injured in traffic each year. This is one of the largest health problems for society in both Continue reading
A nuclear power plant is a very complex dynamic system with a lot of built in regulators and security systems that make it almost impossible to know by reasoning,exactly how the system dynamics is going to react due to Continue reading