Mathematical modeling and experimental investigation of pressure characteristics inside the pilot stage of the deflector jet servo valve considering secondary jet velocity distribution

IF 1 4区工程技术 Q3 ENGINEERING, AEROSPACE Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering Pub Date : 2024-08-30 DOI:10.1177/09544100241277234

Shenghong Ge, Hanhao Yang, Wenhao Cheng, Yuchuan Zhu

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Abstract

Existing mathematical models for deflector jet hydraulic amplifiers cannot accurately describe the influence of the deflector motion on the receiver jet, which results in calculation differences for the receiver pressure. To deeply investigate this problem, the momentum transfer model considering secondary jet velocity distribution was used to develop an improved model that is more aligned with the actual state of the flow field. In this model, the receiver jet velocity is calculated, for the first time, with a maximum error of 18% when compared with existing models. To verify the improved model, the recovery pressures in the receivers were verified by numerical simulations and experiments. The verification results show that the model can accurately predict the recovery pressures in the receivers within an 8.1% maximum error. This model fills the gaps in the theoretical research and lays a foundation for the structural design of deflector jet pressure servo valves.

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考虑二次射流速度分布的偏转射流伺服阀先导级内部压力特性的数学建模和实验研究

现有的导流板射流液压放大器数学模型无法准确描述导流板运动对接收器射流的影响，从而导致接收器压力的计算差异。为了深入研究这一问题，我们采用了考虑二次射流速度分布的动量传递模型，以建立一个更符合流场实际状态的改进模型。在该模型中，首次计算出了接收器射流速度，与现有模型相比，最大误差仅为 18%。为了验证改进后的模型，我们通过数值模拟和实验验证了接收器中的回收压力。验证结果表明，该模型可以准确预测接收器中的回收压力，最大误差不超过 8.1%。该模型填补了理论研究的空白，为偏转喷射压力伺服阀的结构设计奠定了基础。

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来源期刊

Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering 工程技术-工程：机械

CiteScore

2.40

自引率

18.20%

发文量

212

审稿时长

5.7 months

期刊介绍： The Journal of Aerospace Engineering is dedicated to the publication of high quality research in all branches of applied sciences and technology dealing with aircraft and spacecraft, and their support systems. "Our authorship is truly international and all efforts are made to ensure that each paper is presented in the best possible way and reaches a wide audience. "The Editorial Board is composed of recognized experts representing the technical communities of fifteen countries. The Board Members work in close cooperation with the editors, reviewers, and authors to achieve a consistent standard of well written and presented papers."Professor Rodrigo Martinez-Val, Universidad Politécnica de Madrid, Spain This journal is a member of the Committee on Publication Ethics (COPE).