In R & D projects “Correlation of Z-drive with Ducted Propellers” the findings in the field of CFD calculations have been successfully applied for the systematic numerical investigation of ducted propellers . The established references and procedures for Reynolds number correction are an important basis for the evaluation of experiments with ducted propellers or thrusters with ducted propellers to full-scale. In the R & D project “Increasing the Design Reliability of Ducted Propeller Systems at Bollard Pull Conditions” and ” Reynolds Number Effects on the Bollard Pull Prediction” the process of bollard pull prediction with tugboats having a ducted propeller arrangement was analysed , . In particular, the findings related to the cavitation thrust break down of the ducted propeller at high load levels are now an integral part in the design process of propulsion system. With the chart worked out by the SVA for estimating the risk of cavitation induced thrust break down, the need for cavitation testing can be determined.
Extensive investigations of cavitation on the propulsion systems of tugs were conducted in the cavitation tunnel of the SVA and the large circulation and cavitation tunnel (UT2) of the TU Berlin , , , . Among others, bollard pull tests with cavitation similarity between models of Voith Water Tractors and AHTs (VWT) were conducted. In the R & D projects “Forecasting Reliability for the Power Requirement of Tugs with Ducted Propeller Systems”, geosimulation experiments and comprehensive CFD calculations were carried out. These results were used to analyse the scale influences on the propulsion prediction for tugs. The results of measurements and calculations were compared with full-scale measurements of AHTs and integrated into the predicting procedures.
Context Related References / Research Projects
 Abdel-Maksoud, M., Heinke, H.-J.: Scale Effects on Ducted Propellers, 24th Symposium on Naval Hydrodynamics, Fukuoka, Japan, 2002
 Mertes, P., Heinke, H.-J.: Aspects of the Design Procedure for Propellers Providing Maximum Bollard Pull, ITS 2008, Singapore, 2008
 Heinke, H.-J., Hellwig, K.: Aspekte der Pfahlzugprognose für Schlepper großer Leistung,104. Hauptversammlung der Schiffbautechnischen Gesellschaft, Hamburg, 2009
 Heinke, H.-J.: Model tests with Voith Schneider Propellers at high thrust coefficients, Hydrodynamic Symposium – Voith Schneider Propulsion, Heidenheim, March 2006
 Heinke, H.-J.: High-Speed Camera Observations of the Cavitation at a Voith Schneider Propeller, 2nd Symposium Voith Schneider Technology, Heidenheim, June 2008
 Heinke, H.-J., Grabert, R.: Influence of the Reynolds number on the characteristic of ducted propellers, 68. Sitzung des FA “Schiffshydrodynamik” der STG, Hamburg, 08.10.2014