The experimental investigation of the critical heat flux (CHF) of saturated nucleate pool boiling of pure water and water-based Al₂O₃ nanofluids on the platinum wire with a diameter of 50 μm was conducted under earth gravity and hypergravity. The gravity level ranges from 1 to 3 g, the saturation pressures range from 0.1 to 0.6 MPa, and the Al₂O₃ concentration in the nanofluids ranges from 0.001wt% to 0.015wt%. The experimental results show that both pressure and gravity are vital factors enhancing the CHF, with the effect of pressure more pronounced. For nanofluids with concentration C > 0.005wt %, CHF initially increased with the increase in gravity. When the gravity is greater than 2 g, CHF does not increase further with the increase in gravity. Increasing nanoparticle concentration significantly enhances the CHF for low nanoparticle concentrations less than 0.005 wt%, and the CHFs change little for further increasing the concentration. Nanofluid has a stronger enhancement to the pool boiling CHF than the combination of the heating surface coated with the same kind of nanoparticles and the base fluid. With the increase of particles concentration, Surface modification gradually becomes dominant mechanism for CHF enhancement.

在地球重力和超重力条件下，对直径为50 μm的铂丝上纯水和水基Al ₂ O _{3纳米流体的饱和核池沸腾临界热流密度（CHF）进行了实验研究。}纳米流体的重力水平范围为1至3g，饱和压力范围为0.1至0.6MPa，纳米流体中Al ₂ O _{3浓度范围为0.001wt%至0.015wt%。}实验结果表明，压力和重力都是增强CHF的重要因素，其中压力的作用更为明显。对于浓度C > 0.005wt%的纳米流体，CHF最初随着重力的增加而增加。当重力大于2g时，CHF不再随着重力的增加而进一步增加。对于低于 0.005 wt% 的低纳米颗粒浓度，增加纳米颗粒浓度显着提高 CHF，并且进一步增加浓度 CHF 变化很小。纳米流体比涂有同类纳米颗粒的加热面与基液的组合对池沸腾CHF有更强的增强作用。随着颗粒浓度的增加，表面修饰逐渐成为CHF增强的主导机制。