|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Hydro-elastic computational analysis of a marine propeller using two-way fluid structure interaction显示文摘Marine propellers have complex geometry and their performance is determined by costly and time consuming open water experiments.Use of numerical techniques helps researchers in effective design of propellers.Several approaches are used that predicted either hydrodynamic and acoustic response or structural response.Two-way fluid-structure interaction(FSI)analysis is a very useful approach providing all three responses which helps in the design,analysis and optimization of a propeller.The objective of this paper is to predict the hydro-elastic response of a propeller using two-way FSI on a 0.2m diameter,DTMB-4119 propeller using ANSYS software.Two-way FSI analysis is carried out using system coupling approach that transfers the data between the structural and fluid solvers.The turbulence effects are captured using the large-eddy simulation(LES)model and the Ffowcs Williams Hawkings(FWH)acoustic model is used for evaluating the sound pressure level(SPL)generated by propeller.Analysis is extended to evaluate the hydro-elastic and acoustic response of the propeller after validating the hydrodynamic performance with the experimental result in the literature.The results from Two-way FSI analysis are in close agreement when compared with the one-way FSI analysis.Two-way FSI can accommodate the peak value of stress and deformation developed during the initial part of the transient solution which is important in the design of propeller.This study reveals that metallic(NAB)propeller can be replaced by a composite propeller.The acoustic response from two-way FSI analysis will be more realistic due to the consideration of hydro-elastic effect of propeller. | V.Rama Krishna Srinivas Prasad Sanaka N.Pardhasaradhi B.Raghava Rao | 2022 | Journal of Ocean Engineering and Science2022，7，3： | 2 |
| 2 | Aquaporin‐4 in manganese‐treated cultured astrocytes显示文摘 | Kakulavarapu V.Rama Rao Arumugam R.Jayakumar Pichili V. B.Reddy XiaoyingTong Kevin M.Curtis M. D.Norenberg | 2010 | Glia2010，，12： | 1 |
| 3 | SOX Section 404 Material Weakness Disclosures and Audit Fees显示文摘 | Raghunandan K Dasaratha V.Rama | | 0，，： | 1 |
| 4 | Shareholder Voting on Auditor Sdection,Audit Fees,and Audit Quality显示文摘 | Mai Dao K.Raghunandan Dasaratha V.Rama | | 0，，01： | 1 |
| 5 | Effect of phytase superdosing, myo-inositol and available phosphorus concentrations on performance and bone mineralisation in broilers显示文摘A total of 2,376 one-day-old Ross broiler chickens were used to investigate the effect of myo-inositol(MYO) and phytase supplementation on performance and bone mineralization variables in broilers fed diets formulated to have varying concentrations of available phosphorus(P). The trial was designed as a2×2×3 factorial; with and without phytase superdosing(0 or 1,500 FTU/kg), MYO(0 or 3 g/kg), and dietary P(low, moderate or high). At 21 d, dietary phytase and MYO had no consistent benefit on bone mineralization variables. Bone ash reduced by 4.7% from the medium to low P diet(P < 0.01),with no effect of phytase supplementation. Superdosing improved bone P content by 6% in birds fed the low P diet, signifying an interaction between dietary P concentrations and phytase(P < 0.05). Dietary MYO addition resulted in a numerical reduction in bone ash and a significant reduction in bone strength(P < 0.05). At 42 d, the beneficial effect of phytase superdosing on feed intake and body weight gain was evident in the low P diet. Superdosing reduced feed conversion rate(FCR) at all P levels(P < 0.05),although this effect was more pronounced on the low P diet, suggesting that sufficient P being released from the phytase itself to re-phosphorylate MYO and hence improve FCR. The significant improvement in FCR was greater with superdosing than with MYO alone, and the combination led to no further improvement in FCR compared with superdosing alone, signifying a phytase and MYO interaction(P < 0.05). From these results, it can be estimated that MYO is providing around 30% to 35% of the total response to superdosing. | Sophie A.Lee Devanaboyina Nagalakshmi Mantina V.L.N.Raju Savaram V.Rama Rao Michael R.Bedford | 2017 | Animal Nutrition2017，，3： | 1 |
| 6 | 富地幔:金伯利岩结核中透辉石的钕、锶同位素显示文摘据报导在布尔特丰坦(阿扎尼亚)、金伯来、和南非的金伯利岩管中发现的云母、石榴二辉橄榄岩的结核中含的透辉石有钕、锶同位素成分。根据放射性成因的^(87)Sr或^(86)Sr的比值,透辉石数值达到地幔特征值,可由未被混染的大陆和海洋的玄武岩来解释。这些数值被用来证明准大陆地幔的古老富集及总成分的多样性,因此足以补偿海洋地幔的亏损。 | Martin Menzies V.Rama Murthy 朱连兴 | 1992 | 世界地质1992，11，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员