Mechanical Measurements Essay Example | Topics and Well Written Essays - 1000 words

Mechanical Measurements - Essay ExampleThis technique is also sensitive to extreme temperatures because it affects the transition of the luminescent molecules (Mantel 2005). The PSP material is also employ to develop coat for self adhesive tape and decals. This approach is preferable as its quick and easy during experimentation. Its also reduces the time consumed for climb preparation as well as cost minimization (Mantel 2005). Pressure sensitive paint technique is also used in wind tunnels for embrace management. Due to the ability of this technique to provide field management, it produces global surface maps with better resolutions. Producing high quality global surface maps however requires a exceed understanding of the e internal mechanisms of the technique as well as the functions, properties and experimental setup (Sullivan & Liu 2004). This technique has been found to be easier, more accurate speedy and cost effective as compared to the use of pressure ports and computati onal fluid dynamics for external pressure management. ... mage illustrates the parts of the pressure sensitive paint thingmajig The pressure sensitive paint is made up of luminescent molecules that are distributed in an oxygen permeable polymer reaper binder. When the PSP is exposed to ultraviolet rays, it causes the luminescent molecules to gain a higher energy state. In this state the molecules can decay is several ways such as shifting the energy to the polymer binder, conflicting with the oxygen molecules on the PSP surface and discharging the light (Mantel 2005). The luminescent molecules are sensitive to oxygen molecules therefore when they collide with the oxygen molecules, they react to produce light. The produced light is in return proportional to the come of oxygen molecules available on the surface. Most of the collisions between the luminescent molecules and oxygen occur when the PSP is under a lot of pressure, therefore the amount of light emitted is inversely propo rtional to the pressure on the surface. Hence the pressure on the surface is easily calculated from the amount of light emitted. However, the challenge with the luminescent molecules transferring the energy to the polymer binder is that the energy transfer requires increase in temperature therefore causing the temperature on the PSP surface to rise (Mantel 2005). This affects the ability of the luminescent molecules to react with oxygen and could lead to disclose of inaccurate results. The effects of the temperature rise are slight because in most cases the temperature rises by a few degrees. The use of PSP could also be challenging because of the personality of experiments and high level of sensitivity. Fig 2 schematic diagram of pressure-sensitive paint measurement system TheMoire?techniqueforstress/strainanalysis The watered-silk technique is used to determine