A Study of Instability Phenomenon in a Supercritical Diffuser Flow

超临界扩压器流动不稳定现象的研究

• 批准号: 60550127
• 负责人: MATSUO Kazuyasu
• 金额: $ 1.28万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550127/
• 关键词: Supercritical diffuser; transonic flow; shock wave; choking; 流体振動

1. The behavior of a shock wave in a supercritical diffuser under a constant overall pressure ratio is classified into a stable oscillation about its mean shock position and an unstable one where a shock wave is generated downstream of its throat and moves upstream and the cycle is repeated.2. An analysis of the stability criterion of a shock wave which interacts with periodic, lowfrequency downstream pressure disturbances has been performed taking the diffuser efficiency of the subsonic flow downstream of a shock wave into consideration.3. The behavior of stable and unstable shock waves in a two-dimensional circular diffuser has been experimentally clarified by a schlieren optical method and by pressure measurements.4. The response and subsequent motion of shock waves by the interaction of small-amplitude pressure disturbances are presended as a function of the Mach number where the shock is initially located and the diffuser efficiency of the subsonic region downstream of the shock.5. The curve of neutral stability which relates the diffuser efficiency to the Mach number of a shock wave is obtained and it is shown that the criterion agrees well with the present experimental results as well as with the previous experimental ones.

1.在恒定总压比下，超临界扩散器中激波的行为可分为围绕其平均激波位置的稳定振荡和在喉部下游产生激波并向上移动并重复循环的不稳定振荡。考虑了激波下游亚音速流动的扩散器效率，分析了激波与下游周期性低频压力扰动相互作用时的稳定性判据。通过纹影光学方法和压力测量，对二维圆形扩散器中稳定和不稳定激波的行为进行了实验研究。激波在小幅压力扰动作用下的响应和后续运动是激波初始位置的马赫数和激波下游亚音速区域扩散器效率的函数。得到了扩散器效率与激波马赫数之间的中性稳定性曲线，结果表明，该判据与目前的实验结果和前人的实验结果符合得很好。

项目成果

Kazuyasu MATSUO: "Interaction of a Normal Shock Wave with Small Pressure Disturbances in a Diffuser" Engineering Sciences Reports of Kyushu University. 8. 45-50 (1986)

Kazuyasu MATSUO：“扩散器中正常冲击波与小压力扰动的相互作用”九州大学工程科学报告。

松尾一泰: 日本機械学会論文集. 52. 3171-3175 (1986)

Kazuyasu Matsuo：日本机械工程师学会会议记录 52. 3171-3175 (1986)。

松尾一泰: 九州大学総合理工学研究科報告. 8. 45-50 (1986)

Kazuyasu Matsuo：九州大学研究生院科学与工程报告。8. 45-50 (1986)

Kazuyasu MATSUO: "Investigations of Transonic Diffusers (1st Report, Behavior of a Shock Wave in a Two-Dimensional Circular Diffuser)" Transactions of the Japan Society of Mechanical Engineers. 52. 3171-3175 (1986)

Kazuyasu MATSUO：“跨音速扩散器的研究（第一份报告，二维圆形扩散器中冲击波的行为）”日本机械工程师学会会刊。