摘要
使用集总参数法 ,建立了描述微射流作动器工作过程的数学模型。计算结果显示 ,对于给定的驱动模式 ,作动器各工作参数基本上随驱动频率同步发展。另外存在着最佳的驱动电压频率和开口大小 。
We used lumped parameter method to establish the mathematical model of the working process of micro jet acturator. The governing equations are eqs.(1a) through (1e); they involve many parameters: (1) displacement and velocity of metallic membrane of actuator, (2) density and pressure of airflow, (3) air velocity at exit. Eqs.(1a) through (1e) are strongly coupled ordinary differential equations. Calculated results for a numerical example in section 2 show that, after a short transient period of only about five cycles, the variations of various parameters in the micro jet actuator approach values that become synchronized with the driving force of the actuator. For the same numerical example, we calculated the variations of air velocity at exit with vibration frequency (Fig.3a) and diameter of the circular exit (Fig.3b) respectively. Figs.3 (a) and 3(b), in our opinion, show that optimal combination of vibration frequency and exit diameter exists to give maximum energy transfer efficiency, which, we deem, can be represented by air velocity at exit.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2001年第1期140-143,共4页
Journal of Northwestern Polytechnical University
基金
国防科技重点实验室基金! (98JS6 0 .4.1ZS6 0 9)
