Empirically derived optimization model: Theoretical formulation and validation

A set of empirically derived equations that accurately predict leakage flow and power loss in journal bearings are proposed. The proposed equations take into account the effect of groove geometry, groove location, as well as the supply pressure and the bearing geometry. Simulation results show maximum deviation of 15% on leakage flow and 10% on power loss as compared to 25% and 13%, respectively, for models in the literature. Utilizing the proposed equations, a hybrid optimization technique that minimizes power loss and side leakage in journal bearings operating in laminar flow is developed. The results also indicated that the groove location has a significant effect on the optimization model and significant power loss savings may be realized with appropriate location of oil groove. (C) 2011 Elsevier Ltd. All rights reserved.