نتایج جستجو برای: aerospace engine
تعداد نتایج: 80801 فیلتر نتایج به سال:
Aircraft turbine engines routinely experience the ingestion of debris resulting in “foreign object damage” or FOD. Failures associated with foreign object damage have been estimated to cost the aerospace industry $4 billion per year. Often, FOD does not lead to sudden catastrophic failure, yet such damage can dramatically reduce the lifetime of components subjected to cyclic fatigue stresses. T...
The SART (Space Launcher Systems Analysis) group of the German Aerospace Center DLR has the task of examining all types of future space launch systems and the thereof required engines by means of modern, computer-aided methods. One of the fundamental aims is to reduce the cost of access to space through the identification of eligible technology. Activities range from stand-alone preliminary stu...
As the aerospace industry is moving towards the More Electric Aircraft, there is a growing demand for electrical power to feed the increasing electrical loads in the aircraft. More Electric Aircraft (MEA) and More Electric Engine (MEE) are terms that are sometimes mistakenly being used interchangeably, but that are actually very different. This paper outlines some of the issues that have been c...
Aerospace engines testing is a source of noise pollution and determining the low frequency acoustic characteristics of the test cell, plays an important role in optimally control of the sound field and reducing the level of sound pressure and pollution. In this study, the drop in average sound pressure level is numerically predicted by constructing a test cell according to ISO 140 standard. To ...
Abstract A radical shift in technology is necessary to enable future air transport solutions. Sustainability targets for aeroengine manufacturing mean more than reducing CO 2 and NO X . The will open up possibilities bring new challenges when introducing hybrid- electrical propulsion technologies using materials, solutions business models. This article reports on findings from a longitudinal st...
Present day jet engines are controlled and monitored by a series of hydraulic, fueldraulic, electrical and pneumatic sub-systems known as the Full Authority Digital Engine Controller (FADEC). At the heart of the FADEC lies a centralised Electronic Engine Controller (EEC) responsible for control and safety of the wider engine system. It has long been postulated that a distributed EEC would contr...
Nowadays, computer-aided tools have enabled the creation of electronic design documents on an unprecedented scale, while determining and finding what can be reused for a new design is like searching for a “needle in a haystack.” For example, as reported by Marsh [1], there are approximately 40,000 documents produced in the design of a single engine in an aerospace company. The availability of s...
In today’s business climate, aerospace companies are more than ever in need of rational methods and techniques that provide insights as to the best strategies which may be pursued for increased profitability and risk mitigation. However, the use of subjective, anecdotal decision-making remains prevalent due to the absence of analytical methods capable of capturing and forecasting future needs. ...
In the current paper, a methodology combining case study with computational tool for aerospace engineering students is presented and discussed. The aim of this to improve understanding jet engine's operation through their thermodynamic cycle analysis, particularly focused on effects main boundary conditions an aircraft engine: altitude flight velocity (or Mach). Additionally, organization as pe...
Aero-engine hollow turbine blades are work under prolonged high temperature, requiring dimensional accuracy. Blade profile and wall thickness important parameters to ensure the comprehensive performance of blades, which need be measured accurately during manufacturing process. In this study, a accuracy industrial computed tomography (ICT) measuring method was developed based on standard cylindr...
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