CAJ | 학술논문

文中建立一种激光测量燃油管道润湿阻力的方法及实验装置。得到了小流管条件下润湿阻力大小的解析表达式，即液体表面斜率与反射亮场及入射光通光半径之间的解析关系。根据弯曲液体表面光反射原理及光电自动检测原理，建立了润湿阻力的激光测量实验装置。依据激光反射图样光斑大小可以测出液面的斜率和液面与管壁的接触角。再根据润湿阻力的解析式，得到了润湿阻力大小。实验上，观察到特殊的弯曲液体表面激光反射图样，该图样为圆形光斑，具有明显的干涉圆环。圆形光斑的大小不仅与入射光通光半径有关，而且与表面的弯曲度有关。理论上润湿阻力的大小与液体的表面张力成正比，与接触角的余弦值成正比。本装置具有无损和自动化特点。
문중건립일충격광측량연유관도윤습조력적방법급실험장치。득도료소류관조건하윤습조력대소적해석표체식，즉액체표면사솔여반사량장급입사광통광반경지간적해석관계。근거만곡액체표면광반사원리급광전자동검측원리，건립료윤습조력적격광측량실험장치。의거격광반사도양광반대소가이측출액면적사솔화액면여관벽적접촉각。재근거윤습조력적해석식，득도료윤습조력대소。실험상，관찰도특수적만곡액체표면격광반사도양，해도양위원형광반，구유명현적간섭원배。원형광반적대소불부여입사광통광반경유관，이차여표면적만곡도유관。이론상윤습조력적대소여액체적표면장력성정비，여접촉각적여현치성정비。본장치구유무손화자동화특점。
A kind of method by means of laser was suggested and experimental set-up was constructed to study wet resistance in fuel pipe and its measurement. The wet resistance force would be acted on the fluid by the surface of the pip because of the wet effect between the liquid and the pip surface. The expression of wet resistance force was derived under small pip condition based on the liquid principle. A laser measurement set-up was constructed based on the light reflected from curved liquid surface and automatic electron-optics detection. The diameter of the special optics pattern depended on both the aperture diameter and curved degree of liquid surface. The analytic expression of light pattern diameter related with the slope of curved liquid surface and aperture diameter was arrived theoretically. The force depended linearly on the liquid surface tension and cosine of contact angle. A special pattern reflected from curved liquid surface was observed which was circle with clear interference fringes. The slop of liquid surface and contact angle was detected by means of the pattern scale and the experimental value of wet resistance force was archived. It has no-touch, no-damage and automatic properties.