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| 1 | Novel scaling law for estimating propeller tip vortex cavitation noise from model experiment显示文摘The tip vortex cavitation(TVC) noise of marine propellers is of interest due to the environmental impacts from commercial ships as well as for the survivability of naval ships. Due to complicated flow and noise field around a marine propeller, a theoretical approach to the estimation of TVC noise is practically unrealizable. Thus, estimation of prototype TVC noise level is realized through extrapolation of the model TVC noise level measured in a cavitation tunnel. In this study, for the prediction of prototype TVC noise level from a model test, a novel scaling law reflecting the physical basis of TVC is derived from the Rayleigh-Plesset equation, the Rankine vortex model, the lifting surface theory, and other physical assumptions. Model and prototype noise data were provided by Samsung Heavy Industries(SHI) for verification. In applying the novel scaling law, similitude of the spectra of nuclei is applied to assume the same nuclei distribution in the tip vortex line of the model and the prototype. It was found that the prototype TVC noise level predicted by the novel scaling law has better agreement with the prototype TVC noise measurement than the prototype TVC noise level predicted by the modified ITTC noise estimation rule. | Jisoo Park Woojae Seong | 2017 | Journal of Hydrodynamics2017，29，6： | 3 |
| 2 | Effect of ionic composition on thermal properties of energetic ionic liquids显示文摘A model to predict the effect of ionic composition on the thermal properties of energetic ionic liquids was developed by quantitative structure-property relationship modeling,which predicted the detonation velocity,pressure,and melting temperature of energetic ionic liquids.A hybrid approach was used to determine the optimal subset of descriptors by combining regression with the genetic algorithm as an optimization method.The model showed the high accuracy,reaching a correlation factor of R^(2) as 0.71,0.73 and 0.68 for the correlation between the calculated detonation velocity,pressure and melting temperature against reported values.It was validated extensively and compared to the Kamlet–Jacobs equation.The effect of ion composition on the thermal properties of energetic ionic liquids could be quantitatively analyzed through the developed model,to give an insight for the design of new energetic ionic liquids. | Chihyun Park Minsu Han Jinbo Kim Woojae Lee Eunkyoung Kim | 2018 | npj Computational Materials2018，，1： | 2 |
| 3 | Time-domain Kirch- hoff model for acoustic scattering from an impedance polygon facet 显示文摘 | KEUHNWA L WOOJAE S | 2009 | Acoustical Society of America2009，126，1： | 1 |
| 4 | Structure-borne noise reduction for an infinite, elastic cylindrical shell显示文摘 | Ko Sung Hwan Seong Woojae Pyo Sangwoo | 2001 | J Acoust Soc Am2001，109，4： | 1 |
| 5 | Agent based intelligent search framework for product information using ontology mapping 显示文摘 | Wooja Kim Dae Woo Choi Sangun Park | 2007 | Journal of Intelligent Information Systems2007，，2： | 1 |
| 6 | Association Between Functional Impairment, Depression, and Extrapyramidal Signs in Neuroleptic-Free Patients With Alzheimer Disease显示文摘 | Junbae Choi Woojae Myung Jae Won Chung Hyo Shin Kang Duk L. Na Seong Yoon Kim Jae-Hong Lee Seol-Heui Han Seong Hye Choi SangYun Kim Seonwoo Kim Bernard J. Carroll Doh Kwan Kim | 2013 | Journal of Geriatric Psychiatry and Neurology2013，，3： | 1 |
| 7 | Robust Matched Field-processing Algorithm Based on Feature Extraction显示文摘 | Woojae S Sung-Hoon B | | 0，，03： | 1 |
| 8 | A sub-nanometric three-axis surface encoder with short-period planar gratings for stage motion measurement显示文摘 | Akihide Kimura Wei Gao WooJae Kim Koji Hosono Yuki Shimizu Lei Shi Lijiang Zeng | 2012 | Precision Engineering2012，，4： | 1 |
| 9 | Anoxic gas recirculation system for fouling control in anoxic membrane reactor显示文摘Anoxic gas recirculation system was applied to control the membrane fouling in pilot-scale 4-stage anoxic membrane bioreactor(MBR). In the anaerobic-anoxic-anoxic-aerobic flow scheme,hydrophilic polytetrafluoroethylene(PTFE) membrane(0.2 μm, 7.2 m2/module) was submerged in the second anoxic zone. During 8 months operation, the average flux of the membrane was 21.3L/(m2·hr). Chemical cleaning of the membrane was conducted only once with sodium hydroxide and sodium hypochlorite. Dissolved oxygen(DO) concentration in the second anoxic zone was maintained with an average of 0.19 ± 0.05 mg/L. Gas chromatography analysis showed that the headspace gas in the second anoxic reactor was mainly consisted of N2(93.0% ± 2.5%), O2(3.8% ± 0.6%), and CO2(3.0% ± 0.5%), where the saturation DO concentration in liquid phase was 1.57 mg/L. Atmospheric O2 content(20.5% ± 0.8%) was significantly reduced in the anoxic gas. The average pH in the reactor was 7.2 ± 0.4. As a result, the recirculation of the anoxic gas was successfully applied to control the membrane fouling in the anoxic MBR. | Hansaem Lee Daeju Lee Seongwan Hong Geum Hee Yun Sungpyo Kim Jung Ki Hwang Woojae Lee Zuwhan Yun | 2014 | Journal of Environmental Sciences2014，26，6： | 0 |
| 10 | Shallow water source localization using a mobile short horizontal array显示文摘This paper presents an approach to the challenging issue of passive source localization in shallow water using a mobile short horizontal linear array with length less than ten meters. The short array can be conveniently placed on autonomous underwater vehicles and deployed for adaptive spatial sampling. However,the use of such small aperture passive sonar systems makes it difficult to acquire sufficient spatial gain for localizing long-range sources. To meet the requirement, a localization approach that employs matched-field based techniques that enable the short horizontal linear array is used to passively localize acoustic sources in shallow water. Furthermore, the broadband processing and inter-position processing provide robustness against ocean environmental mismatch and enhance the stability of the estimation process. The proposed approach's ability to localize acoustic sources in shallow water at different signal-to-noise ratios is examined through the synthetic test cases where the sources are located at the endfire and some other bearing of the mobile short horizontal linear array. The presented results demonstrate that the positional parameters of the estimated source build up over time as the array moves at a low speed along a straight line at a constant depth. | Dexin Zhao Woojae Seong Keunhwa Lee Zhiping Huang | 2013 | Journal of Systems Engineering and Electronics2013，24，5： | 0 |
| 11 | Micro/nano-wrinkled elastomeric electrodes enabling high energy storage performance and various form factors显示文摘Stretchable elastomer-based electrodes are considered promising energy storage electrodes for next-generation wearable/flexible electronics requiring various shape designs.However,these elastomeric electrodes suffer from the limited electrical conductivity of current collectors,low charge storage capacities,poor interfacial interactions between elastomers and conductive/active materials,and lack of shape controllability.In this study,we report hierarchically micro/nano-wrinkle-structured elastomeric electrodes with notably high energy storage performance and good mechanical/electrochemical stabilities,simultaneously allowing various form factors.For this study,a swelling/deswelling-involved metal nanoparticle(NP)assembly is first performed on thiol-functionalized polydimethylsiloxane(PDMS)elastomers,generating a micro-wrinkled structure and a conductive seed layer for subsequent electrodeposition.After the assembly of metal NPs,the conformal electrodeposition of Ni and NiCo layered double hydroxides layers with a homogeneous nanostructure on the micro-wrinkled PDMS induces the formation of a micro/nano-wrinkled surface morphology with a large active surface area and high electrical conductivity.Based on this unique approach,the formed elastomeric electrodes show higher areal capacity and superior rate capability than conventional elastomeric electrodes while maintaining their electrical/electrochemical properties under external mechanical deformation.This notable mechanical/electrochemical performance can be further enhanced by using spiral-structured PDMS(stretchability of~500%)and porous-structured PDMS(areal capacity of~280μAh cm^(-2)). | Changeun Yoo Seokmin Lee Yongkwon Song Woojae Chang Moon Kyu Park Younji Ko Jinhan Cho | 2023 | Carbon Energy2023，5，12： | 0 |
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