The emergence of nanotechnology and existence of computational techniques for measuring the thermophysical properties of nanolubricants has culminated in a substantial number of experimental studies over past two decades. Development of nanoparticles is a field that has more proximity to innovations taking place in the domain of physics and chemistry but their application aspects have attracted the researchers towards the performance analysis of equipments with nanolubricants in diverse engineering fields. This paper presents a state-of-the-art review of various numerical and experimental studies conducted for enhancing the tribological performance of journal bearings with different lubricants. A comprehensive review of previously published studies has been provided as a valuable guide for researchers to choose the correct lubricant(s), nanoparticle(s), and selection of numerical and analytical methods for further exploration in the field of nanolubricants for performance enhancement of journal bearings. Several practical and technical issues with their potential solutions have also been explored in the field of nanolubricants. Despite their exemplary tribological performance, there is a dire need to formulate computational methods for the evaluation of journal bearing performance by taking the effects of nanolubricants into consideration.

在过去的二十年中，大量的实验研究使纳米技术的出现和用于测量纳米润滑剂热物理性质的计算技术的高潮。纳米颗粒的开发是一个更接近于物理和化学领域中发生的创新的领域，但是它们的应用方面吸引了研究人员进行各种工程领域中具有纳米润滑剂的设备的性能分析。本文介绍了各种数值和实验研究的最新进展，以提高使用不同润滑剂的轴颈轴承的摩擦学性能。我们对以前发表的研究进行了全面的回顾，为研究人员选择正确的润滑剂提供了宝贵的指导，纳米颗粒，以及数值和分析方法的选择，以便在纳米润滑剂领域进一步探索以提高轴颈轴承的性能。在纳米润滑剂领域中，还已经探索了一些具有潜在解决方案的实用和技术问题。尽管它们具有出色的摩擦学性能，但迫切需要通过考虑纳米润滑剂的影响来制定用于评估轴颈轴承性能的计算方法。