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| 1 | Experimental Study of Corner Stall in a Linear Compressor Cascade显示文摘In order to gain a better knowledge of the mechanisms and to calibrate computational fluid dynamics (CFD) tools including both Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES),a detailed and accurate experimental study of corner stall in a linear compressor cascade has been carried out.Data are taken at a Reynolds number of 382 000 based on blade chord and inlet velocity.At first,inlet flow boundary layer is surveyed using hot-wire anemometry.Then in order to investigate the effects of incidence,measurements are acquired at five incidences,including static pressures on both blade and endwall surfaces measured by pressure taps and the total pressure losses of outlet flow measured by a five-hole pressure probe.The maximum losses as well as the extent of losses of the corner stall are presented as a function of the investigated incidences. | MA Wei OTTAVY Xavier LU Lipeng LEBOEUF Francis GAO Feng | 2011 | Chinese Journal of Aeronautics2011，24，3： | 8 |
| 2 | Experimental investigation of flow field in a laboratory-scale compressor显示文摘The inner flow environment of turbomachinery presents strong three-dimensional, rotational, and unsteady characteristics. Consequently, a deep understanding of these flow phenomena will be the prerequisite to establish a state-of-the-art design system of turbomachinery. Currently the development of more accurate turbulence models and CFD tools is in urgent need for a high-quality database for validation, especially the advanced CFD tools, such as large eddy simulation(LES). Under this circumstance, this paper presents a detailed experimental investigation on the 3D unsteady flow field inside a laboratory-scale isolated-rotor with multiple advanced measurement techniques, including traditional aerodynamic probes, hotwire probes, unsteady endwall static pressure measurement, and stereo particle image velocimetry(SPIV). The inlet boundary layer profile is measured with both hotwire probe and aerodynamic probe. The steady and unsteady flow fields at the outlet of the rotor are measured with a mini five-hole probe and a single-slanted hotwire probe. The instantaneous flow field in the rotor tip region inside the passage is captured with SPIV,and then a statistical analysis of the spatial distribution of the instantaneous tip leakage vortex/flow is performed to understand its dynamic characteristics. Besides these, the uncertainty analysis of each measurement technique is described. This database is quite sufficient to validate the advanced numerical simulation with LES. The identification process of the tip leakage vortex core in the instantaneous frames obtained from SPIV is performed deliberately. It is concluded that the ensemble-averaged flow field could not represent the tip leakage vortex strength and the trajectory trace. The development of the tip leakage vortex could be clearly cataloged into three phasesaccording to their statistical spatial distribution. The streamwise velocity loss induced by the tip leakage flow increases until the splitting process is weak and the turbulent mixing phase is dominant. | Ma Hongwei Wei Wei Xavier Ottavy | 2017 | Chinese Journal of Aeronautics2017，30，1： | 3 |
| 3 | Effects of thermal and mechanical pretreatments of secondary sludge on biogas production under thermophilic conditions显示文摘 | Mavi Climent Ivet Ferrer Ma del Mar Baeza Adriana Artola Felícitas Vázquez Xavier Font | 2007 | Chemical Engineering Journal2007，，1： | 2 |
| 4 | Well-to-wake energy and greenhouse gas analysis of SO X abatement options for the marine industry显示文摘 | Hongrui Ma Koen Steernberg Xavier Riera-Palou Nigel Tait | 2012 | Transportation Research Part D2012，，4： | 2 |
| 5 | DNA-based vaccination against hepatitis C virus (HCV):effect of expressing different forms of HCV E2 protein and use of CPG-optimized vectorsin mice 显示文摘 | Xiao Ying Ma Xavier Forns Robin Gutierrez | 2002 | Vaccine2002，20，2002： | 1 |
| 6 | Elec- troacupuncture promotes a decrease in inflammatory re- sponse associated with Thl/Th2 cytokines, nitric oxide and leukotriene B4 modulation in experimental asthma显示文摘 | Carneiro ER Xavier R_A De Castro MA | 2010 | Cytokine2010，50，3： | 1 |
| 7 | Metformin inhibits in- flammatory angiogenesis in a murine sponge model 显示文摘 | Xavier DO Amaral LS Gomes MA | 2010 | Biomed Pharmacother2010，64，： | 1 |
| 8 | Effect of an adverse pressure gradient on the streamwise Reynolds stress profile maxima in a turbulent boundary layer显示文摘It is widely accepted that in a turbulent boundary layer (TBL) with adverse pressure gradient (APG) an outer peak usually appears in the profile of streamwise Reynolds stress. However, the effect of APG on this outer peak is not clearly understood. In this paper, the effect of APG is analysed using the numerical and experimental results in the literature. Because the effect of upstream flow is inherent in the TBL, we first analyse this effect in TBLs with zero pressure gradient on flat plates. Under the individual effect of upstream flow, an outer peak already appears in the profile of streamwise Reynolds stress when the TBL continues developing in the streamwise direction. The APG accelerates the appearance of the outer peak, instead of being a trigger. | Wei Ma Xavier Ottavy Li-Peng Lu Francis Leboeuf | 2013 | Acta Mechanica Sinica2013，29，3： | 1 |
| 9 | Electro a cupuncture promotes a decrease in inflammatory response associated with Thl/Th2 cytokines, nitric oxide and leukotriene B4 modulation in experimental asthma 显示文摘 | CARNEIRO ER XAVIER RA DE CASTRO MA | 2010 | Cytokine2010，50，3： | 1 |
| 10 | DNA-based vaccination against hepatitis C virus (HCV): effect of expressing different forms of HCV E2 protein and use of CPG-optimized vectors in mice 显示文摘 | Xiao Ying Ma Xavier Forns Robin Gutierrez | 2002 | Vaccine2002，20，： | 1 |
| 11 | Occult hepatitis B virus infection in liver transplant patients in a Brazilian referral center显示文摘 | Ferrari TC Xavier MA Vidigal PV | 2014 | Braz J Med Biol Res2014，47，11： | 1 |
| 12 | Progastrin-releasing Pepfide (ProGRP) in patients with benign and malignant diseases:comparison with CEA,SCC,CYFRA 21-1 and NSE in patients with lung cancer显示文摘 | Rafael Molina Jose MA Xavier Filella | 2005 | Anticancer Research2005，25，3： | 1 |
| 13 | Estimation of the local synthesis of immunoglobulin G (IgG) in the central nervous system of patients with spinal cord schistoso-miasis by the IgG index显示文摘 | Ferrari TC Correa-Oliveira R Xavier MA | 1999 | Trans R Soc Trop Med Hyg1999，93，5： | 1 |
| 14 | Electroacupunc-ture promotes a decrease in inflammatory response associated with Th1/Th2cytokines,nitric oxide and leukotriene B4modulation in experimental asthma显示文摘 | Carneiro ER Xavier RA De Castro MA | 2010 | Cytokine2010，50，3： | 1 |
| 15 | Electroacupuncture promotes a decrease in inflammatory response associated with Th1/Th2 cytokines,nitric oxide and leuktriene B4 modulation in experimental asthma显示文摘 | Carneiro ER Xavier RA De Castro MA | 2010 | Cytokine2010，50，3： | 1 |
| 16 | Parameter study on numerical simulation of corner separation in LMFA-NACA65 linear compressor cascade显示文摘Large-eddy simulation(LES) is compared with experiment and Reynolds-averaged Navier-Stokes(RANS), and LES is shown to be superior to RANS in reproducing corner separation in the LMFA-NACA65 linear compressor cascade, in terms of surface limiting streamlines,blade pressure coefficient, total pressure losses and blade suction side boundary layer profiles. However, LES is too expensive to conduct an influencing parameter study of the corner separation.RANS approach, despite over-predicting the corner separation, gives reasonable descriptions of the corner separated flow, and is thus selected to conduct a parametric study in this paper. Two kinds of influencing parameters on corner separation, numerical and physical parameters, are analyzed and discussed: second order spatial scheme is necessary for a RANS simulation; incidence angle and inflow boundary layer thickness are found to show the most significant influences on the corner separation among the parameters studied; unsteady RANS with the imposed inflow unsteadiness(inflow angle varying sinusoidally with fluctuating amplitude of 0.92°) does not show any non-linear effect on the corner separation. | Gao Feng Ma Wei Sun Jinjing Jérome Boudet Xavier Ottavy Liu Yangwei Lu Lipeng Shao Liang | 2017 | Chinese Journal of Aeronautics2017，30，1： | 0 |
| 17 | Endoscopic Ruler for varix size measurement:A multicenter pilot study显示文摘BACKGROUND We invented Endoscopic Ruler,a new endoscopic device to measure the size of varices in patients with cirrhosis and portal hypertension.AIM To assess the feasibility and safety of Endoscopic Ruler,and evaluate the agreement on identifying large oesophageal varices(OV)between Endoscopic Ruler and the endoscopists,as well as the interobserver agreement on diagnosing large OV using Endoscopic Ruler.METHODS We prospectively and consecutively enrolled patients with cirrhosis from 11 hospitals,all of whom got esophagogastroduodenoscopy(EGD)with Endoscopic Ruler.The primary study outcome was a successful measurement of the size of varices using Endoscopic Ruler.The secondary outcomes included adverse events,operation time,the agreement of identifying large OV between the objective measurement of Endoscopic Ruler and the empirical reading of endoscopists,together with the interobserver agreement on diagnosing large OV by Endoscopic Ruler.RESULTS From November 2020 to April 2022,a total of 120 eligible patients with cirrhosis were recruited and all of them underwent EGD examinations with Endoscopic Ruler successfully without any adverse event.The median operation time of Endoscopic Ruler was 3.00 min[interquartile range(IQR):3.00 min].The kappa value between Endoscopic Ruler and the endoscopists while detecting large OV was 0.52,demonstrating a moderate agreement.The kappa value for diagnosing large OV using Endoscopic Ruler among the six independent observers was 0.77,demonstrating a substantial agreement.CONCLUSION The data demonstrates that Endoscopic Ruler is feasible and safe for measuring the size of varices in patients with cirrhosis and portal hypertension.Endoscopic Ruler is potential to promote the clinical practice of the two-grade classification system of OV. | Yi-Fei Huang Sheng-Juan Hu Yang Bu Yi-Ling Li Yan-Hong Deng Jian-Ping Hu Shao-Qi Yang Qian Shen Mark McAlindon Rui-Chun Shi Xiao-Qin Li Tie-Ying Song Hai-Long Qi Tai-Wei Jiao Meng-Yuan Liu Fang He Jun Zhu Bin Ma Xiao-Bin Yu Jian-Yang Guo Yue-Hua Yu Hai-Jiang Yong Wen-Tun Yao Ting Ye Hua Wang Wen-Fu Dong Jian-Guo Liu Qiang Wei Jing Tian Xiao-Guo Li Xavier Dray Xiao-Long Qi | 2023 | World Journal of Gastrointestinal Endoscopy2023，15，9： | 0 |
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