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High temperature flow-rate control valve is a key component to control the flow rate of fuel supply for aerospace engines. A high temperature fuel flow-rate control valve, pilot-controlled by a high pressure pneumatic system, is developed in this paper. The construction and working principle of the valve are introduced. The thermodynamic mathematical models of the valve are built and the thermodynamic...
Titanium alloys are widely used in aerospace industry due to their excellent mechanical properties. Because of their low thermal conductivity, high chemical activity, large friction coefficient and so on, such problems occur during the cutting process as high cutting temperature, large specific cutting force and serious tool wear, leading to low machining efficiency. The titanium alloys classified...
A numerical procedure has been applied to analyze the temperature distribution in a rolling tire. A 3D finite element model of a rolling tire is established to simulate the mechanical field under the certain inflation pressure, loading and velocity condition. The thermal properties and loss factor of rubber are measured. The strain and the stress of nodes are fit by Fourier Series and are used to...
During a solder reflow process, IC components deform under a rather excessive temperature loading. A too high warpage at temperatures above solder melting, can cause either that the joints in the corner are not soldered to the PCB pads, or that the solder joints are shorted due to compressing of the corner joints. In this work, the warpage of a 35by35 mm2 large PBGA package has been measured during...
We report on the design and experimental validation of a distributed Brillouin-based optical fiber sensor embedded into concrete structures for temperature and strain measurement. A composite-made wave-like coating designed by finite-element analysis ensures the sensor is transferring optimally temperature and strain fields from the concrete to the optical fiber, where Brillouin scattering takes place...
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