A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network
Abstract
The paper presents a proposal of mathematical models for the determination of propulsion coefficient, eta pp, intended for the analysis of motor freighters applied on the river watercourses. As the main paper contribution three different model types are developed, depending on the variable which contributes to eta pp value. These variables are: 1. the freighter sailing velocity, (nu); 2. the installed capacity of the main drive motor of outboard unit, (N-inst); 3. the combination of these two variables, (N-inst, nu). The models are verified on the examples of several motor freighters which are applied at Danube river. The special attention is paid to the determination of the optimum approximation function in each case. In all three cases it is a quadratic function. The correlation coefficient for the comparison in all analyzed examples is higher than 0.87, being even higher than 0.99 for the first model.
Keywords:
total and friction resistance / residual resistance / propulsion coefficient / Motor freighter / correlation coefficientSource:
Journal of The Serbian Society For Computational Mechanics, 2019, 13, 1, 130-145Publisher:
- Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac
Funding / projects:
- Software development and national database for strategic management and development of transportation means and infrastructure in road, rail, air and inland waterways transport using the European transport network models (RS-MESTD-Technological Development (TD or TR)-36027)
DOI: 10.24874/jsscm.2019.13.01.09
ISSN: 1820-6530
WoS: 000485100700009
Scopus: 2-s2.0-85092223443
Collections
Institution/Community
Inovacioni centarTY - JOUR AU - Rajković, Radoslav AU - Mitić, Dragan S. AU - Lebl, Aleksandar AU - Rajković, Snežana PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3244 AB - The paper presents a proposal of mathematical models for the determination of propulsion coefficient, eta pp, intended for the analysis of motor freighters applied on the river watercourses. As the main paper contribution three different model types are developed, depending on the variable which contributes to eta pp value. These variables are: 1. the freighter sailing velocity, (nu); 2. the installed capacity of the main drive motor of outboard unit, (N-inst); 3. the combination of these two variables, (N-inst, nu). The models are verified on the examples of several motor freighters which are applied at Danube river. The special attention is paid to the determination of the optimum approximation function in each case. In all three cases it is a quadratic function. The correlation coefficient for the comparison in all analyzed examples is higher than 0.87, being even higher than 0.99 for the first model. PB - Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac T2 - Journal of The Serbian Society For Computational Mechanics T1 - A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network EP - 145 IS - 1 SP - 130 VL - 13 DO - 10.24874/jsscm.2019.13.01.09 ER -
@article{ author = "Rajković, Radoslav and Mitić, Dragan S. and Lebl, Aleksandar and Rajković, Snežana", year = "2019", abstract = "The paper presents a proposal of mathematical models for the determination of propulsion coefficient, eta pp, intended for the analysis of motor freighters applied on the river watercourses. As the main paper contribution three different model types are developed, depending on the variable which contributes to eta pp value. These variables are: 1. the freighter sailing velocity, (nu); 2. the installed capacity of the main drive motor of outboard unit, (N-inst); 3. the combination of these two variables, (N-inst, nu). The models are verified on the examples of several motor freighters which are applied at Danube river. The special attention is paid to the determination of the optimum approximation function in each case. In all three cases it is a quadratic function. The correlation coefficient for the comparison in all analyzed examples is higher than 0.87, being even higher than 0.99 for the first model.", publisher = "Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac", journal = "Journal of The Serbian Society For Computational Mechanics", title = "A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network", pages = "145-130", number = "1", volume = "13", doi = "10.24874/jsscm.2019.13.01.09" }
Rajković, R., Mitić, D. S., Lebl, A.,& Rajković, S.. (2019). A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network. in Journal of The Serbian Society For Computational Mechanics Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac., 13(1), 130-145. https://doi.org/10.24874/jsscm.2019.13.01.09
Rajković R, Mitić DS, Lebl A, Rajković S. A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network. in Journal of The Serbian Society For Computational Mechanics. 2019;13(1):130-145. doi:10.24874/jsscm.2019.13.01.09 .
Rajković, Radoslav, Mitić, Dragan S., Lebl, Aleksandar, Rajković, Snežana, "A Proposed Method for Determining Propulsion Coefficient Based on Testing Motor Freighters on Danube Waterway Network" in Journal of The Serbian Society For Computational Mechanics, 13, no. 1 (2019):130-145, https://doi.org/10.24874/jsscm.2019.13.01.09 . .