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Materials & Design v.117, 2017년, pp.430 - 444   SCIE
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Opto-mechanical design for sight windows under high loads

Ihracska, Balazs (University of Hertfordshire, School of Engineering and Technology, College Lane, Hatfield, Hertfordshire AL10 9AB, UK ) ; Crookes, Roy James (School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK ) ; Montalvão, Diogo (Department of Design and Engineering, Faculty of Science and Technology, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB, UK ) ; Herfatmanesh, Mohammad Reza (University of Hertfordshire, School of Engineering and Technology, College Lane, Hatfield, Hertfordshire AL10 9AB, UK ) ; Peng, Zhijun (University of Hertfordshire, School of Engineering and Technology, College Lane, Hatfield, Hertfordshire AL10 9AB, UK ) ; Imran, Shahid (Department of Mechanical Engineering (KSK Campus), University of Engineering and Technology, Lahore, Pakistan ) ; Korakianitis, Theodosios (Parks College of Engineering, Aviation and Technology, Saint Louis University, St. Louis, MO 63103, USA ) ;
  • 초록  

    Abstract In this study, the design aspects of optically accessible pressure vessels are investigated via a case study of a High Pressure Combustor experimental rig. The rig was designed to take optical measurements of combustion, simulating the conditions found in internal combustion engines and turbines. Although, it is not new to equip chambers and reactors with sight windows, important aspects of design and relevant information regarding optical access is missing or are insufficiently explored or not readily accessible in the existing literature. A comprehensive review of requirements for optical access to such high-pressure, high-temperature systems has been conducted. It is shown in a readily-navigable format as function of application and precision, with data and technical correlations hitherto not found in a ‘user-friendly’ style. The material selection procedure is detailed and supported by a complete comparison of optical materials and relevant properties. The review revealed a significant inconsistency in mechanical properties claimed in the literature for optical materials. As a response to this, increased safety factor values are suggested as function of level of uncertainties and effects of failure, typically three to four times higher than the industrial standard. Moreover, newly developed equations are presented linking performance analysis to the design criteria. Highlights The relevant properties of practical optical materials were collected and presented in a readily navigable format. Mechanical properties of optical materials are found to be inconsistent for elevated temperatures and for fatigue loads. In response to the unreliable material data increased safety factors are required, detailed recommendations are provided. As function of application, clear design criteria recommendations are shown. Aspects of opto-mechanical performance were described in depth and newly developed equations and relations are presented. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Optically-accessible reactor .   Optical engine .   Pressure vessel .   Sapphire .   Window design .   Combustion.  

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