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| 1 | Numerical Analysis of Nozzle Clearance's Effect on Turbine Performance显示文摘Variable nozzle turbine (VNT) has become a popular variable geometry turbine (VGT) technology for the diesel engine application. Nozzle clearance, which can't be avoided on the hub and shroud side of the VNT turbine due to the pivoting stators, can lead to turbine performance deterioration. However, its mechanism is still not clear. In this paper, numerical investigation, which is validated by experiment, is carried out to study the mechanism of the nozzle clearance's effect on the turbine performance. Firstly, performance of the mixed flow turbine with fixed nozzle clearances tested on flow bench. Performance of the tested turbine with the same nozzle clearance is numerically simulated. The numerical result agrees well with the test data, which proves correct of the numerical method. Then the turbine performance with different nozzle clearances is numerically analyzed. The research showed that with nozzle clearance, flow loss in the nozzle increases at first and it reaches the maximum value when the clearance ratio is 5%. Flow at the exit of the nozzle becomes less uniform with nozzle clearance. The negative incidence angle of the rotor also increases with nozzle clearance and leads to more incidence angle loss in the rotor. The low energy fluid formed in the nozzle due to the nozzle clearance migrates from hub to shroud side in the rotor, which is another main reason for the rotor's performance degradation. The present research exposed the mechanism of the dramatically decrease of the turbine performance with nozzle clearance: (a) The loss associated with the nozzle leakage increases with the nozzle clearance; (b) The flow loss grows up quickly in the rotor due to the incidence angle loss and migration of the low energy fluid from hub to shroud side. | HU Liangjun YANG Ce SUN Harold ZHANG Jizhong LAI Mingchia | 2011 | Chinese Journal of Mechanical Engineering2011，24，4： | 17 |
| 2 | Hypoglycemic and hypolipidemic effects and antioxidant activity of fruit extracts from Lycium barbarum显示文摘 | Qiong Luo Yizhong Cai Jun Yan Mei Sun Harold Corke | 2004 | Life Sciences2004，，2： | 2 |
| 3 | Antioxidant activity and phenolic compounds of 112 traditional Chinese medicinal plants associated with anticancer显示文摘 | Yizhong Cai Qiong Luo Mei Sun Harold Corke | 2003 | Life Sciences2003，，17： | 2 |
| 4 | HPLC Chaxactedzation of Betalains from Plants in the Amaranthaceae 显示文摘 | Y'mhong Cai Mei Sun Harold Corke | 2005 | Journal of Chromatographic Science2005，43，： | 1 |
| 5 | Numerical Simulation of Air Flow Through Turbocharger Compressors with Dual Volute Design显示文摘 | Kui Jiao Harold Sun Xianguo Li | 2009 | Applied Energy2009，86，： | 1 |
| 6 | Protein characteristics of Chinese black-grained wheat显示文摘 | Wende Li Trust Beta Shancheng Sun Harold Corke | 2005 | Food Chemistry2005，，3： | 1 |
| 7 | Characterization of polycyclic aromatic hydrocarbons (PAHs) on lime spray dryer (LSD) ash using different extraction methods显示文摘 | Ping Sun Linda K. Weavers Panuwat Taerakul Harold W. Walker | 2005 | Chemosphere2005，，2： | 1 |
| 8 | A potential antioxidant resource:endophytic fungi from medicinal plants显示文摘 | Huang W Y Cai Y Z Xing J Harold C Sun M | 2007 | Economic Botany2007，61，： | 1 |
| 9 | Highly polymorphic AFLP markers as a complementary tool to ITS sequences in assessing genetic diversity and phylogenetic relationships of sweetpotato (Ipomoea batatas (L.) Lam.) and its wild relatives显示文摘 | Junchao Huang Harold Corke Mei Sun | 2002 | Genetic Resources and Crop Evolution2002，，6： | 1 |
| 10 | Chemical stability and colorant properties of betaxanthin pigments from celosia argentea显示文摘 | Cai Yizhong Sun Mei Harold Corke | 2001 | J Agric Food Chem Phytochemistry2001，49，： | 1 |
| 11 | Colorant properties and stability of Amaranthus betacyanin显示文摘 | Yizhong Cai Mei Sun Harold Corke | 1998 | Journal of Agricultural and Food Chemistry1998，46，： | 1 |
| 12 | Hypoglycemic and hypolipidemie effects and antioxidant activity of fruit extracts from Lycium barbarum 显示文摘 | Qiong Luo Yizhong Cai Jun Yah Mei Sun Harold Corke | 2004 | Food and Chemical Toxicology2004，7，： | 1 |
| 13 | Numerical simulation of air flow through turbocharger compressors with dual volute design显示文摘 | Kui Jiao Harold Sun Xianguo Li Hao Wu Eric Krivitzky Tim Schram Louis M. Larosiliere | 2009 | Applied Energy2009，，11： | 1 |
| 14 | Synthesis and properties of disperse dyes containing a built-in triazine stabilizer显示文摘 | SUN Yanfeng ZHAO Defeng HAROLD S F | 2007 | Dyes and Pigments2007，74，： | 1 |
| 15 | Antioxidant activity and phenolic compounds of 112 traditional Chinese medicinal plants associated with anticancer显示文摘 | Yizhong Cai Qiong Luo Mei Sun Harold Corke | 2003 | Life Sciences2003，，17： | 1 |
| 16 | Anthocyanins, flavonols, and free radical scavenging activity of Chinese bayberry (Myrica rubra) extracts and their color properties and stability 显示文摘 | BAO J S CAI Y Z SUN M WANG G Y HAROLD C | 2005 | Journal of Agricultural and Food Chemistry2005，53，： | 1 |
| 17 | Systematic evaluation of natural phenolic antioxidants from 133 Indian medicinal plants显示文摘 | Siddharthan Surveswaran Yi-Zhong Cai Harold Corke Mei Sun | 2006 | Food Chemistry2006，，3： | 1 |
| 18 | Neratinib,an irreversible ErbB receptor tyrosine kinase inhibitor,in patients with advanced ErbB2-positive breast cancer显示文摘 | Harold J Burstein Yan sun | | 0，，08： | 1 |
| 19 | Effect of phytochemical extracts on the pasting, thermal, and gelling properties of wheat starch显示文摘 | Fan Zhu Yi-Zhong Cai Mei Sun Harold Corke | 2008 | Food Chemistry2008，，4： | 1 |
| 20 | Characterization and application of betalain pigments from plants of the Amaranthaceae 显示文摘 | Yi-Zhong Cai Mei Sun Harold Corke | 2005 | Trends in Food Science&Technology2005，16，： | 1 |
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