Noise generation mechanisms of Dyson high speed fans

戴森高速风扇的噪音产生机制

• 批准号: 2284946
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2284946
• 关键词: Noise; generation; mechanisms; Dyson; speed

At the heart of Dysons's products, such as vacuum cleaners, hair dryers and hand dryers, is an efficient high-speed fan for providing high flow rates at large pressure. However, like most fans they are also noisy. Compared to their noise levels made in simple laboratory conditions, their noise is known to increase once installed in the machine since the air passing through the fan, after flowing through the machine, becomes distorted and turbulent. The precise relationship between the characteristics of the air passing through the fan and its noise radiation is one of the key objectives of the project. This project is predominantly an experimental study into the understanding and identification of the mechanisms of noise generation from this latest generation of high-speed fans. Particular emphasis will be given to 'installation effects' on the noise. The project will develop and use state-of-the-art measurement techniques for characterising the noise and the flow, understanding the noise generation mechanisms, and hence provide solutions for its mitigation. The experiments will take place on a new fan rig designed and built by Dyson at the University of Southampton.The successful PhD candidate will join the Acoustics group at the Institute of sound and Vibration Research (ISVR). The ISVR is recognised as one of the world's leading centres for the investigation of sound and vibration phenomena. Applications are invited from prospective UK candidates with an excellent degree (or an equivalent standard in other qualifications approved by the University) in a relevant mathematics, science or engineering subject. Strong mathematical skills will be an advantage.The studentship will be fully-funded including paid tuition fees (UK/EU rate). We are fortunate that we are able to pay a tax-free bursary that is significantly greater than the standard rate. Regular interaction with staff at Dyson is anticipated together with visits to the company.

Dysons产品的核心，如真空吸尘器，吹风机和干手机，是一个高效的高速风扇，在大压力下提供高流量。然而，像大多数球迷一样，他们也很吵。与在简单的实验室条件下测得的噪声水平相比，已知一旦安装在机器中，它们的噪声就会增加，因为通过风扇的空气在流过机器后会变得扭曲和湍流。通过风机的空气特性与其噪声辐射之间的精确关系是该项目的关键目标之一。该项目主要是一项实验研究，以了解和识别这种最新一代高速风扇的噪声产生机制。将特别强调对噪音的“安装效果”。该项目将开发和使用最先进的测量技术来表征噪音和流动，了解噪音产生机制，从而提供缓解噪音的解决方案。实验将在南安普顿大学戴森设计和建造的新风扇装置上进行。成功的博士候选人将加入声音和振动研究所（ISVR）的声学组。ISVR被公认为世界领先的声音和振动现象研究中心之一。申请邀请具有相关数学，科学或工程学科优秀学位（或大学批准的其他资格的同等标准）的潜在英国候选人。具有较强的数学能力将是一个优势。该奖学金将是全额资助，包括支付学费（英国/欧盟利率）。我们很幸运，我们能够支付比标准费率高得多的免税助学金。预计将与戴森员工定期互动，并参观公司。