Jiangsu Key Laboratory of Green Ship Technology

Wuxi, China

Jiangsu Key Laboratory of Green Ship Technology

Wuxi, China
SEARCH FILTERS
Time filter
Source Type

Yang L.,China Ship Scientific Research Center | Yang L.,Jiangsu Key Laboratory of Green Ship Technology | Zhang H.,China Ship Scientific Research Center | Shen D.,China Ship Scientific Research Center | Pan Z.,China Ship Scientific Research Center
Ship Building of China | Year: 2017

In this paper, hydrodynamic characteristics of the CSSRC flap rudder are studied and simulated with consideration of the influence of the tail wing gap. By adding a contra tail to the CSSRC rudder, the fish-tail type of flap rudder is designed and its lift performance is compared with the CSSRC rudder and the one with NACA66 profile respectively in the same condition. Numerical results demonstrate that the fish-tail type of flap rudder has better performance. Comparatively accurate regression formulae of the hydrodynamic performance for the three rudders are put forward with the stepwise regression method. © 2017, Editorial Office of Ship Building of China. All right reserved.


Li L.,China Ship Scientific Research Center | Li L.,Jiangsu Key Laboratory of Green Ship Technology | Liu D.,China Ship Scientific Research Center | Liu D.,Jiangsu Key Laboratory of Green Ship Technology
Ship Building of China | Year: 2017

Pressure fluctuation on the duct of a ducted propeller with pre-strut being behind a model ship was measured with micro dynamic pressure sensors. Experimental device, experimental method and the method of dealing with the data were described. Characters of fluctuating pressure on the inner face of the duct was analyzed in the frequency domain, and distributions along the circumferential direction and the axial direction were obtained. The influence of water speed and main parameters of the propeller on the fluctuating pressure was studied. The results show that the line-spectrum of fluctuating pressure is mainly related to the rotor's BPF, where the first BPF is a major component. Fluctuating pressures on all circumferential measuring points are well matched without significant differences. The fluctuating pressure on middle point of the blade chord is biggest and it decrease rapidly along the axial direction with the increase of distance from the propeller plane. The rate of decrease towards the outlet section is faster than that towards the inlet section. The distribution of fluctuating pressure in different water speed shows no difference, but the value of fluctuating pressure increases quickly with water speed. The linear relation between the propeller's diameter and the maximum fluctuating pressure on the duct is significant. © 2017, Editorial Office of Ship Building of China. All right reserved.


He T.,China Ship Scientific Research Center | He T.,Jiangsu Key Laboratory of Green Ship Technology | Wang Q.-B.,China Ship Scientific Research Center | Wang Q.-B.,Jiangsu Key Laboratory of Green Ship Technology | And 4 more authors.
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2017

Control valves are used in cooling systems to adjust pump working condition and balance flow volume rates for cooling users. Cooling systems are always running during the sail time and control valves vibration under fluid dynamic excitation and cause boat noise radiation. Therefore, the low noise control valves should be designed to control boat noise radiation. In this paper, the hydraulic and acoustic design methods are constituted. Low noise design principles of control valves such as dividing, multilevel, labyrinth turning are analyzed and verified based on CFD method. The layered labyrinth control valve is designed and analyzed numerically. The analysis results indicate that outflow of trim is uneven and local high speed and low pressure region exists, large eddies forming in valve body cavity and trim outflow regions are major noise sources. © 2017, Editorial Board of Journal of Ship Mechanics. All right reserved.


He T.,China Ship Scientific Research Center | He T.,Jiangsu Key Laboratory of Green Ship Technology | Hao X.-Y.,China Ship Scientific Research Center | Hao X.-Y.,Jiangsu Key Laboratory of Green Ship Technology | And 4 more authors.
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2017

Control valves used in ship piping system become vibration and noise sources because of fluid dynamic excitation, low noise designs of control valves focus on suppressing inception of cavitations and evening flow dynamic characteristics. In this paper, some optimizations are used to control valve noise. The optimizations are two-double trim with uneven holes, inlet guidance, plug vibration isolation device, outlet guidance. CFD results show that the optimizations are effective. Experimental results on normal, layered labyrinth and new type low noise valves show that new type low noise valve behaves better hydrodynamic noise, vibration and air-noise performances. The optimization designs on low noise control valve are verified experimentally. © 2017, Editorial Board of Journal of Ship Mechanics. All right reserved.


Huang H.-B.,China Ship Scientific Research Center | Huang H.-B.,Jiangsu Key Laboratory of Green Ship Technology | Wu Y.-X.,China Ship Scientific Research Center | Wang J.-F.,China Ship Scientific Research Center | And 2 more authors.
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2017

The cavitation characteristics for podded propeller of a whole RoRo model in the CLCC and its test method were presented and introduced. A good agreement of cavitation performance and the induced fluctuation pressures on model between CLCC and Marin was abtained under the same test condition, same locations for same RoRo ship model. © 2017, Editorial Board of Journal of Ship Mechanics. All right reserved.


Liu Y.,Jiangsu Key Laboratory of Green Ship Technology | Liu Y.,China Ship Scientific Research Center | Chen L.,Shanghai JiaoTong University
Journal of Vibroengineering | Year: 2016

The effect of weld residual stress on the free vibrational characteristics of cylindrical shell is investigated. Motion equations of cylindrical shell with weld residual stress are established based on Flügge theory, the interaction between weld residual stress and displacements is investigated. The analytical method is applied to calculate the vibrational mode. Weld residual stress can induce the variation of free vibrational characteristics. The amplitude mainly effects the variation magnitude of natural frequency and mode shape, and the distribution dose on the variation trend. © JVE INTERNATIONAL LTD.


Zhao N.,China Ship Scientific Research Center | Zhao N.,Jiangsu Key Laboratory of Green Ship Technology | Liu J.-J.,China Ship Scientific Research Center | Liu J.-J.,Jiangsu Key Laboratory of Green Ship Technology | And 2 more authors.
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2015

Based on broadside collision mode, the angle of two ships while collision happening and impacted position of store ship in each stage is analyzed, and the damage behavior of a store ship broadside in collision is studied through numerical simulation by explicit non-linear finite element method. The time history of collision force, energy absorption and structural deformation during collision are described. The damage mode and the resistant effects of the side structure and movement of the both encountered ships are analyzed and discussed. Some general instructive conclusions on behavior of store ship broadside collision are obtained. The research work of this paper provides a guide for evaluation of side structural damage of store ship and optimization design of side structure. ©, 2015, China Ship Scientific Research Center. All right reserved.


Hu Q.,China Ship Scientific Research Center | Hu Q.,Jiangsu Key Laboratory of Green Ship Technology | Zong T.,China Ship Scientific Research Center | Xu J.,China Ship Scientific Research Center | And 2 more authors.
Ship Building of China | Year: 2016

Speed trial standard ISO15016:2015 is applied to ships for which the speed trials were conducted on or after 1st September, 2015. In this paper, main differences between ISO15016:2015 and ISO15016:2002 were presented, and comparison analysis of speed correction for two ships based on ISO15016:2015 and ISO15016:2002 respectively was carried out. On this basis, some problems in ISO15016:2015 were pointed out, and impact of the standard on shipbuilding industry was summarized. © 2016, Editorial Office of Ship Building of China. All right reserved.


Liu D.,China Ship Scientific Research Center | Liu D.,Jiangsu Key Laboratory of Green Ship Technology
Procedia Engineering | Year: 2015

According to the mass transport equations of vapor and liquid, and Rayleigh-Plesset equation, a cavitation model based on a single-fluid multi-phase flow method is proposed, which especially considers the nonlinear variety of the bubble radius and is expected to deal well with cloud cavitating flow.The proposed cavitaion model was validated against a benchmark database for 2D NACA66MOD hydrofoil and experimental photos of E779A propeller sheet cavitation shape. The overall results suggest that the present proposed cavitation model is practicable for simulating cavitating flows. © 2015 Published by Elsevier Ltd.


Wei P.,China Ship Scientific Research Center | Wei P.,Jiangsu Key Laboratory of Green Ship Technology | Yue Y.,China Ship Scientific Research Center | Yue Y.,Jiangsu Key Laboratory of Green Ship Technology | And 3 more authors.
Structural Health Monitoring and Integrity Management - Proceeding of the 2nd International Conference of Structural Health Monitoring and Integrity Management, ICSHMIM 2014 | Year: 2015

Fiber Bragg Grating (FBG) strain sensors with long-distance transmission, high measurement accuracy, distributed measurement, corrosion-resistant and antielectromagnetic interference, and so on suitable for long-term monitoring in harsh environments, become the main direction of development of marine engineering structural health monitoring. On the basis of the characteristics of the marine environment and FBG strain sensor installation process requirements, the FBG strain sensor long-term sealing protection technology was in detail research. FBG strain sensors long-term temperature compensation technique has been proposed, and sensor waterproof seal method is established. By four months of seawater immersion test, the practicality and feasibility of sensor long-term sealing protection method has been verified. The research results can provide technical guidance for marine engineering structural health monitoring. © 2015 Taylor & Francis Group, London.

Loading Jiangsu Key Laboratory of Green Ship Technology collaborators
Loading Jiangsu Key Laboratory of Green Ship Technology collaborators