Optical-fiber-based dynamic measurement system for 3D tip clearance of rotating blades

Zhang, Xiaodong; Xiong, Yiwei; Xie, Suchao; Liu, Hongcheng

doi:10.1364/oe.27.032075

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…2. The turbine's power output, also known as its efficiency "∈" depends on the design of the turbine [19,34]. The power output for a turbine from these kinetic systems can be obtained by ( 2) as follows:…”

Section: Tidal Energy Calculationsmentioning

confidence: 99%

Internet of Things Based Transducer Application to Harness Tidal Energy from coastal and offshore Pakistan

Kumar¹,

Khan

Khan³

et al. 2022

SJET

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This paper aims to transform tidal energy into rotation energy for electricity generation and in the course evaluating sea parameters. This is accomplished by integrating the Internet of Things with tidal energy off the coast (and in a home environment), which further enhances the capabilities of this prototype project to remotely monitor sea-like parameters to enable energy production using tidal energy. As South Korea is transducing tidal energy with a total installed tidal power capacity of above 500MW, Pakistan and Middle Eastern countries can benefit from its vast coastal line. This paper proposes a sustainable design that makes the turbine rotate at high speed. A vertical design is chosen, which is bi-directional. The design of the turbine consists of 3 blades, each occupying a 2 square feet area supported by an iron-rod frame. During the experimentation, an average voltage of 5V was generated, whereas the speed of the turbine generated was 75 RPM. It is the first known attempt of its kind supported by indigenous resources. It is proposed that this type of prototype can be scaled, to the coast to produce electrical energy to meet the energy production needs of the region.

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Section: Tidal Energy Calculationsmentioning

confidence: 99%

Internet of Things Based Transducer Application to Harness Tidal Energy from coastal and offshore Pakistan

Kumar¹,

Khan

Khan³

et al. 2022

SJET

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“…Since three parameters need to be calculated, at least three reference points are required. The 3D-BTC is measured by an optical fiber sensor with three sensing units arranged in an isosceles right triangle [21,22], so three reference points (A 0 , A 1 , and A 2 ) are assumed to arrange in an isosceles right triangle, as shown in Figure 3(a). Besides, in order to determine the axial relative position between the reference points and the blade tip, the following factors are considered comprehensively.…”

Section: Dynamic Computationmentioning

confidence: 99%

“…Moreover, in order to realize the fault diagnosis of blade cracks based on the 3D-BTC, an optical fiber sensor with three sensing units was designed to monitor the 3D-BTC [20]. Besides, the 3D-BTC demodulation method was proposed, and a dynamic measurement system was established so that the 3D-BTC could be accurately measured [21][22][23]. In addition, the change rules of the 3D-BTC of normal and cracked blades were studied utilizing the FEM, and the nickel-based superalloy GH4169 was used as the blade material [24], which also can be used in the field of aerospace engineering, such as the electromagnetic docking system due to its good mechanical properties [25,26].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis of 3D Blade Tip Clearance for Turbine Blades with Typical Cracks

Zhang

Xiong

Huang

et al. 2022

International Journal of Aerospace Engineering

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As well known, the crack is a typical fault of turbine blades, which is difficult to detect due to the weak fault features contained in the rotor vibration. Although some fault diagnosis methods based on blade tip timing (BTT) are proposed to detect blade cracks, the limited fault features can be extracted because the BTT signals contain only one-dimensional fault information. Based on the dynamic analysis, the cracked blade undergoes three-dimensional (3D) deformation so that it would be reflected in the changes of the three-dimensional blade tip clearance (3D-BTC). Therefore, the dynamic characteristics of the 3D-BTC of turbine blades with typical cracks should be investigated to obtain its change rule and achieve a more comprehensive diagnosis of blade cracks. In this paper, the 3D finite element model of the turbine blisk is established, and the fluid-thermal-solid coupling analysis is implemented to calculate the blade deformation. Then, a novel dynamic computation method is proposed to calculate the 3D-BTC based on the blade deformation. The typical blade cracks are taken into consideration, and the dynamic characteristics of the 3D-BTC regarding the typical cracks are analyzed to obtain its change rule. The results show that abundant crack fault information can be obtained based on the 3D-BTC, which can facilitate the comprehensive diagnosis of turbine blade cracks.

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Research on dynamic characteristics of three-dimensional tip clearance with regard to blade crack depth and location of rotary blade-disk-shaft coupling system

Zhang,

Xiong,

Fan

et al. 2024

Nonlinear Dyn

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Optical-fiber-based dynamic measurement system for 3D tip clearance of rotating blades

Cited by 7 publications

References 14 publications

Internet of Things Based Transducer Application to Harness Tidal Energy from coastal and offshore Pakistan

Internet of Things Based Transducer Application to Harness Tidal Energy from coastal and offshore Pakistan

Dynamic Characteristics Analysis of 3D Blade Tip Clearance for Turbine Blades with Typical Cracks

Research on dynamic characteristics of three-dimensional tip clearance with regard to blade crack depth and location of rotary blade-disk-shaft coupling system

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