Rebort asimant Research Paper Example | Topics and Well Written Essays - 1500 words

Rebort asimant - Research Paper Example The aim of the experiment is to understand the operation and performance of the jet engine. This experiment also focuses on the application of the thermodynamic equations in the application of engines. The experiment, also tries to investigate on variation of power, efficiency and torque with the speed of the shaft The jet engine, which is a form of internal combustion engine, gains energy from the combustion of fuel and air which produces mechanical power. However, most energy is get wasted inform of heat. This makes the engines to have large radiators. The power of the engine; energy present in the combustion chamber is converted into useful power; output. The remaining energy gets out inform of thermal loses. Inherently, free power turbines do not drive the compressor while the fixed power turbines do drive the compressor. The free type is used in civilian military due to its power torque. Power output of a jet engine is referred as break power and is measured with a break dynamometer. The jet engine in this report is dry-friction break dynamometer. Dynamometer places the load onto the engine and a corresponding torque is recorded. on the other hand, indicated power Pi describes the power that is released from the combustion chamber by the burning fuel. Generally, break power is less than indicated power since the allowance on the indicated power is for overcoming the friction in the engine. Thermal- which is represented as hp engine output is the total work done by the engine, while the hp value of the fuel consumed give heat added to the air system. Factor that affect thermal efficiency include the inlet temperature of the turbine, the compression ratio and the efficiencies for both the compressor and turbine. For a normal jet engine, the range of the thermal efficiency is 45%-50%, turbine temperatures of 2,500 to 3,000

Write an editorial-style article on the role of economic strength in Essay

Write an editorial-style article on the role of economic strength in natural disasters - Essay Example But in more modern economies, a natural disaster actually appears to have the potential to improve the economy of a nation. Bennett (2) points to the Sichuan, China earthquake that killed nearly 80,000 people in 2008. Official governmental records show that the economy actually grew at a faster than normal rate for the area affected by the earthquake. While economic statistics from the central government in China are notoriously inaccurate, there is little doubt that the economy did actually grow in the short and the long term during the months after the earthquake. With long-term economic growth in mind, how should wealthy nations use this information when considering how to provide aid in the aftermath of a natural disaster? A study of the economics of recovery has revealed that there is a dark side to international aid. Klein (3) represents the more radical edge of this belief. She claims that free markets do not spread capitalism. Rather, NGO’s and governments taking advantage of societies shocked by the ravages of a natural disaster spread capitalism. Natural disasters are actually seen as growth opportunities by these organizations. Perhaps a less cynical and more powerful article focuses on a recent study by Hideki and Skidmore (4) that attempts to quantify the long-term economic benefits of post-disaster relief. What these researchers found is that of 89 countries experiencing natural disasters such as volcanic eruptions, earthquakes and hurricanes, the countries that had the most natural disasters actually had the greatest economic growth over several decades. The reason for this may lie in the fact that the improved economic conditions come from replacing outdated factories and infrastructure with newer, more efficient and productive infrastructure. So, in a way, natural disasters can be a sort of economic boon if some of the aid money is directed and used with an eye to the economic future