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| 1 | Optimization design study of low-Reynolds-number high-lift airfoils for the high-efficiency propeller of low-dynamic vehicles in stratosphere显示文摘Aerodynamic performance of low-Reynolds-number high-lift airfoil makes a great impact on designing a high-efficiency propeller for low-dynamic vehicles in stratosphere. At high altitude,low-Reynolds-number airfoils are supposed to have high lift-drag ratio or high endurance factor at cruising attack angle along with good stall characteristics. To design such a high-performance low-Reynolds-number high-lift airfoil,the paper established a hierarchical multi-objective optimization platform by combing direct search optimization algorithm EXTREM and airfoil flow field solver XFOIL to automatically and quickly calculate aerodynamic performance function of airfoil by computer. It provides an effective solution to multi-point design problem of low-speed low-Reynolds-number airfoil. It can be seen from the results of three typical optimization examples,the new airfoil E387_OPT2,FX63-137_OPT2 and S1223_OPT2 based on hot low-Reynolds-number high-lift airfoils (Eppler 387 airfoil,Wortmann FX63-137 airfoil and S1223 airfoil) can meet the optimization design requirements and have very good aerodynamic characteristics in both design state and non-design state. Thus,the applicability and effectiveness of hierarchical multi-objective optimization platform are verified. | MA Rong1, ZHONG BoWen2 & LIU PeiQing1 1 Key Laboratory of Fluid Mechanics, Ministry of Education, Institute of Fluid Mechanics, School of Aeronautical Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China 2 Department of Aerospace Science, School of Engineering, Cranfield University, MK43 0AL, United Kingdom | 2010 | Science China(Technological Sciences)2010，53，10： | 7 |
| 2 | A GPA diagnostic system foraeroengine applications显示文摘In this research,a GPA(Gas Path Analysis) diagnostic system enhanced with GPA Index is described for gas path sensor and component fault diagnosis.A method of measurement correction is used in order that the measurement data obtained at un-standard ambient and operating conditions can be used for diagnostic analysis.The developed diagnostic system has been implemented into a Cranfield University gas turbine performance and diagnostic analysis software PYTHIA for gas turbine performance degradation analysis.The developed method and software have been applied to a model aero gas turbine engine to test the effectiveness of the system.The analysis shows that the developed diagnostic system can diagnose degraded sensor and components effectively using performance deviation measured at un-standard ambient and operational conditions.Theoretically,the idea of the diagnostic approach can be applied to different gas turbine engines. | Yi-Guang Li(School of Engineering,Cranfield University,Cranfield,Bedford MK43 0AL,England) | 2007 | 航空动力学报2007，22，6： | 5 |
| 3 | Immunoneutralization of growth differentiation factor-9 reveal it partially accounts for mouse oocyte mitogenic activity显示文摘 | GILCHRIST R B RITTER L J CRANFIELD M | 2004 | Biol Reprod2004，71，3： | 1 |
| 4 | Assessment of the pain of blood sugar testing: a randomized controlled trial 显示文摘 | Carley SD Cranfield N | 1999 | Lancet1999，354，11： | 1 |
| 5 | Multiple Cryptos Tyoridium serpentis ooeyst isolates from captivesnakes are not transmissible to amphibians显示文摘 | Graezyk T K Cranfield M R Geitner M E | 1998 | J Parasitol1998，84，6： | 1 |
| 6 | Oocysts of Cryptosporidium from snakes are not infectious to ducklingsbut retain viability after intestinal passage through a refractory host 显示文摘 | Graczyk T K Cranfield M R Fayer R | 1998 | Vet Parasitol1998，77，1： | 1 |
| 7 | Experimental transmission of Cryptosporidium oocyst isolates from mammals, birds and reptiles to captive snakes 显示文摘 | Graczyk T K Cranfield M R | 1998 | Vet Res1998，29，2： | 1 |
| 8 | Multiple heterogenous isolates of Cryptosporidium serpentis from captive snakes are not transmissible to neonatal BALB/c mice(Mus musculus) 显示文摘 | Fayer R Graczyk T K Cranfield M R | 1995 | J Parasitol1995，81，3： | 1 |
| 9 | Oocysts of Cryptosporidium from snakes are not infectious to ducklings but retain viability after intestinal passage through a refractory host 显示文摘 | Graczyk T K Cranfield M R Fayer R | 1998 | Vet Parasitol1998，77，1： | 1 |
| 10 | Rela- ting Consumer Willingness to Pay for Food Safety to Risk Tolerance: An Experimental Approach 显示文摘 | Jennifer Brown John A L Cranfield Spencer Hanson | 2005 | Canadian Journal of Agricultural Economics2005，53，23： | 1 |
| 11 | Recovery of waterborne Cryptosporidium parvum oocysts by freshwater benthic clams (Corbicula fluminea) 显示文摘 | Graczyk TK Fayer R Cranfield MR | 1998 | Appl Environ Microbiol1998，64，： | 1 |
| 12 | Zoonotic transmission of Cryptosporidium parvum : Implications for water-borne cryptosporidiosis 显示文摘 | Graczyk T K Fayer R Cranfield M R | 1997 | Parasitol Today1997，13，9： | 1 |
| 13 | Adenovirusos isolated from wild gorillas are closely related to human species C viruses 显示文摘 | Duncan M Cranfield MR Torano H | 2013 | Virology2013，444，12： | 1 |
| 14 | Relating consumer willingness-to-pay for food safety to risk tolerance: an experimental approach显示文摘 | BROWN J CRANFIELD J A HENSON S | 2005 | Canadian Journal of Agricultural Economics2005，53，23： | 1 |
| 15 | Genesis of Cardiac Arrhyth- mias显示文摘 | Cranfield P F Wit A L Hoffman B F | 1973 | Circulation1973，47，1： | 1 |
| 16 | Randomized doubleblind study of grepafloxicin versus amoxicillin in patients with acute bacterial exacerbations of chronic bronchitis 显示文摘 | Langan C E Cranfield R Breisch S | 1998 | J Antimicrob Chemther1998，42，： | 1 |
| 17 | Effects of mobile phone type signals on calcium levels within human leukaemic T-cells (Jurkat cells)显示文摘 | Cranfield CG Wood AW Anderson V | 2001 | Int J Radiat Biol2001，77，12： | 1 |
| 18 | Knowledge management and higher education:a UK case study显示文摘 | Cranfield D Taylor J | | 0，，06： | 1 |
| 19 | Estimating Consumer Demands across the Development Spectrum: Maxi- mum Likelihood Estimates of An Implicit Direct Additivity Model显示文摘 | Cranfield J Preckel P Eales J Hertel T | 2002 | Journal of Development Economics2002，68，2： | 1 |
| 20 | Immunoneutralization of growth differentiation factor-9 reveal it partially accounts for mouse oocyte mitogenic activity显示文摘 | Gilchrist RB Ritter LJ Cranfield M | 2004 | Biol Repro d2004，71，3： | 1 |
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