laser doppler velocimeter

简明释义

激光多普勒速度计

英英释义

例句

1.A laser doppler velocimeter can be used to study the velocity profiles of blood flow in medical research.

在医学研究中，可以使用激光多普勒速测仪研究血流的速度剖面。

2.The laser doppler velocimeter provides non-intrusive measurements of particle velocities in a fluid.

激光多普勒速测仪提供对流体中颗粒速度的非侵入性测量。

3.The researchers used a laser doppler velocimeter to measure the flow velocity in the river.

研究人员使用激光多普勒速测仪来测量河流中的流速。

4.Engineers utilized a laser doppler velocimeter to analyze the performance of the new turbine design.

工程师们利用激光多普勒速测仪分析新涡轮设计的性能。

5.In the wind tunnel experiments, a laser doppler velocimeter was employed to capture airflow patterns.

在风洞实验中，使用了激光多普勒速测仪来捕捉气流模式。

作文

In the realm of fluid dynamics and engineering, precise measurement of fluid velocity is crucial for various applications, ranging from aerospace to biomedical research. One of the most advanced tools for this purpose is the laser doppler velocimeter, which employs the principles of laser technology and the Doppler effect to provide accurate and real-time measurements of flow velocities. The laser doppler velocimeter (激光多普勒速测仪) operates by directing a coherent laser beam into the fluid being studied. When the laser light interacts with moving particles within the fluid, it undergoes a shift in frequency due to the Doppler effect. This frequency shift can be detected and analyzed to determine the velocity of the particles, and consequently, the velocity of the fluid itself.The advantages of using a laser doppler velocimeter are numerous. Firstly, it allows for non-intrusive measurements, meaning that the device does not disturb the flow of the fluid, which is particularly important in sensitive experiments or applications. Traditional methods of measuring fluid velocity often involve inserting probes or other devices into the flow, which can alter the characteristics of the fluid and lead to inaccurate readings. In contrast, the laser doppler velocimeter measures velocity without physical interference, thus preserving the integrity of the fluid's flow.Secondly, the laser doppler velocimeter offers high spatial and temporal resolution. This means that it can capture rapid changes in velocity across small regions of the fluid, making it ideal for studying turbulent flows or other complex fluid behaviors. Researchers can obtain detailed velocity profiles that reveal insights into the flow structure and dynamics that would be difficult to achieve with other measurement techniques.Moreover, the versatility of the laser doppler velocimeter extends to various fluids, including gases and liquids, and it can be utilized in different environments, from laboratory settings to industrial applications. For instance, in the aerospace industry, the laser doppler velocimeter is used to assess airflow around aircraft components, ensuring optimal aerodynamic performance. In biomedical applications, it can help measure blood flow velocity in vessels, aiding in the diagnosis and treatment of cardiovascular diseases.Despite its many advantages, there are some challenges associated with the use of a laser doppler velocimeter. The accuracy of the measurements can be affected by factors such as particle concentration in the fluid and the presence of background noise from other light sources. Therefore, proper calibration and setup are essential to ensure reliable results. Additionally, the cost of laser doppler velocimeters can be relatively high compared to traditional measurement tools, which may limit their accessibility for smaller laboratories or research facilities.In conclusion, the laser doppler velocimeter (激光多普勒速测仪) represents a significant advancement in the field of fluid measurement technology. Its ability to provide accurate, non-intrusive, and real-time measurements makes it an invaluable tool for researchers and engineers alike. As technology continues to evolve, we can expect further enhancements in the capabilities of laser doppler velocimeters, paving the way for new discoveries and innovations in fluid dynamics and beyond.

在流体动力学和工程领域，精确测量流体速度对于航空航天到生物医学研究等各种应用至关重要。为此，最先进的工具之一是激光多普勒速测仪，它利用激光技术和多普勒效应的原理，提供准确的实时流速测量。激光多普勒速测仪通过将相干激光束引导到被研究的流体中。当激光光与流体中的移动颗粒相互作用时，由于多普勒效应，光的频率会发生变化。这个频率变化可以被检测并分析，从而确定颗粒的速度，进而得出流体本身的速度。使用激光多普勒速测仪的优点有很多。首先，它允许非侵入式测量，这意味着设备不会干扰流体的流动，这在敏感实验或应用中尤为重要。传统的流速测量方法通常涉及将探头或其他设备插入流动中，这可能改变流体的特性并导致不准确的读数。相比之下，激光多普勒速测仪在不物理干扰的情况下进行测量，从而保持流体流动的完整性。其次，激光多普勒速测仪提供高空间和时间分辨率。这意味着它可以捕捉流体中快速变化的速度，适用于研究湍流或其他复杂流动行为。研究人员可以获得详细的速度剖面，揭示流动结构和动态的见解，这些是其他测量技术难以实现的。此外，激光多普勒速测仪的多功能性延伸至各种流体，包括气体和液体，并且可以在不同环境中使用，从实验室到工业应用。例如，在航空航天工业中，激光多普勒速测仪用于评估飞机组件周围的气流，以确保最佳的空气动力性能。在生物医学应用中，它可以帮助测量血管中的血流速度，有助于心血管疾病的诊断和治疗。尽管有许多优点，使用激光多普勒速测仪也存在一些挑战。测量的准确性可能受到流体中颗粒浓度和其他光源背景噪声等因素的影响。因此，正确的校准和设置对于确保可靠结果至关重要。此外，与传统测量工具相比，激光多普勒速测仪的成本相对较高，这可能限制了其在小型实验室或研究设施中的可及性。总之，激光多普勒速测仪代表了流体测量技术领域的重要进步。它能够提供准确、非侵入式和实时的测量，使其成为研究人员和工程师的宝贵工具。随着技术的不断发展，我们可以期待激光多普勒速测仪的能力进一步增强，为流体动力学及其他领域的新发现和创新铺平道路。