论文部分内容阅读
为了较为全面地了解凝胶燃料的流变特性,采用超声波振荡与机械搅拌相结合的方法制备了含铝与不含铝的气相二氧化硅/汽油凝胶燃料,使用旋转流变仪实验研究了各凝胶燃料的剪切变稀特性、触变性、屈服应力与粘弹性等流变参数。结果表明:气相二氧化硅/汽油凝胶燃料具有明显的剪切变稀特性和不可逆触变性。凝胶剂含量增加,凝胶燃料粘度和屈服应力增大。添加10μm粒径铝粉的粘度和屈服应力比5μm粒径铝粉的大,比1μm粒径铝粉的小,但均比不含铝凝胶燃料的大。凝胶燃料在低频振荡下更接近于流体,在高频振荡下具有类固体特征。
In order to fully understand the rheological properties of gel fuel, an aluminum-containing and non-aluminum-containing fumed silica / gasoline gel fuel was prepared by a combination of ultrasonic vibration and mechanical agitation. Shear-thinning properties, thixotropy, yield stress and viscoelasticity of each gel fuel. The results show that the fumed silica / gasoline gel fuel has obvious shear thinning property and irreversible thixotropy. The gel content increases and the gel fuel viscosity and yield stress increase. The viscosity and yield stress of aluminum powder with 10μm particle size are larger than that of 5μm aluminum powder, but smaller than that of aluminum powder with 1μm particle size, but both are larger than those without aluminum gel fuel. Gel fuel is more fluid at low frequency oscillations and solid-like at high frequency oscillations.