液-filled套管井中相位弧阵列声场数值模拟

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本文档标题为"Numerical simulation of an acoustic field generated by a phased arc array in a fluid-filled cased borehole (2014年)",它关注的是在含液套管井中的相位弧阵列发射器对声场产生的影响。传统上,水泥胶结评价工具如水泥胶结测井和可变密度测井所使用的单极声源由于其特性,无法实现定向辐射声能。然而,作者提出了一种新型的相位弧阵列发射器,该技术与传统的单极和偶极发射器有显著区别,能够改善声波的控制和方向性。 论文描述了研究团队采用三维有限差分时域方法(Finite-Difference Time-Domain, FDTD),对含有不同通道的含液套管井中,相位弧阵列产生的声场进行了数值模拟。通过这种方法,研究人员能够精确地模拟和分析这种新型发射器相对于传统单极声源的性能差异。对比结果显示,相位弧阵列发射器能够有效地控制声波在井内的传播路径,提高声波的聚焦性和穿透能力,这对于提高水泥胶结评估的精度具有重要意义。 文章的重点在于工程技术领域,特别是在石油勘探和地球探测技术方面,特别是对于井下设备的设计优化和信号处理技术的提升。这项工作不仅有助于改进现有的水泥胶结测井技术,还能为其他依赖声波传输的井下作业提供理论支持,比如地震勘探或井下通信。此外,它还展示了数值模拟在复杂地质环境中的应用潜力,为未来开发更高效、精确的井下测量设备提供了基础。 这篇论文深入探讨了相位弧阵列在井下声学环境中的优势,并通过数值仿真展示了其在提高定向声能传播效果上的实际应用价值。这将对石油工程实践和技术发展产生积极影响,推动了声波技术和测井技术的创新与进步。

用中文总结以下内容: A number of experimental and numerical investigations have been conducted to study the MBPP stack and wavy flow field characteristics with various designs [10,11]. T. Chu et al. conducted the durability test of a 10-kW MBPP fuel cell stack containing 30 cells under dynamic driving cycles and analyzed the performance degradation mechanism [12]. X. Li et al. studied the deformation behavior of the wavy flow channels with thin metallic sheet of 316 stainless steel from both experimental and simulation aspects [13]. J. Owejan et al. designed a PEMFC stack with anode straight flow channels and cathode wavy flow channels and studied the in situ water distributions with neutron radiograph [14]. T. Tsukamoto et al. simulated a full-scale MBPP fuel cell stack of 300 cm2 active area at high current densities and used the 3D model to analyze the in-plane and through-plane parameter distributions [15]. G. Zhang et al. developed a two-fluid 3D model of PEMFC to study the multi-phase and convection effects of wave-like flow channels which are symmetric between anode and cathode sides [16]. S. Saco et al. studied the scaled up PEMFC numerically and compared straight parallel, serpentine zig-zag and straight zig-zag flow channels cell with zig-zag flow field with a transient 3D numerical model to analyze the subfreezing temperature cold start operations [18]. P. Dong et al. introduced discontinuous S-shaped and crescent ribs into flow channels based on the concept of wavy flow field for optimized design and improved energy performance [19]. I. Anyanwu et al. investigated the two-phase flow in sinusoidal channel of different geometric configurations for PEMFC and analyzed the effects of key dimensions on the droplet removal in the flow channel [20]. Y. Peng et al. simulated 5-cell stacks with commercialized flow field designs, including Ballard-like straight flow field, Honda-like wavy flow field and Toyota-like 3D mesh flow field, to investigate their thermal management performance [21]. To note, the terms such as sinusoidal, zig-zag, wave-like and Sshaped flow channels in the aforementioned literatures are similar to the so called wavy flow channels in this paper with identical channel height for the entire flow field. The through-plane constructed wavy flow channels with periodically varied channel heights are beyond the scope of this paper [22,23].

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