Rapid valve opening technique for supersonic blowdown tunnel

被引：9

作者：

Lu, F. K. ^{[1
]}

Wilson, D. R. ^{[1
]}

Matsumoto, J. ^{[1
]}

机构：

[1] Univ Texas Arlington, Dept Mech & Aerosp Engn, Aerodynam Res Ctr, Arlington, TX 76019 USA

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2009年 / 33卷 / 03期

关键词：

Blowdown wind tunnel; Supersonic wind tunnel; Wind tunnel control;

D O I：

10.1016/j.expthermflusci.2008.11.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In supersonic blowdown tunnels with limited air storage, there is a desire to bring the tunnel to its operating condition as fast as possible. However, if the starting process is too fast, large, dangerous oscillations may occur. A computer-based controller was developed which is able to start a supersonic wind tunnel very quickly without any overshoot of the stagnation pressure. The control system consists of a pressure transducer, a multifunction PC board and an automatic valve. An ideal valve opening profile for a particular test is developed based on test data. The profile is stored in the system memory before a test and the multifunction board sends an analog output to the automatic valve during an actual test. After several tests and corrective interpolations, the pressure disturbances in the plenum chamber are typically reduced to one percent of the stagnation pressure. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：551 / 554

页数：4