{"title":"估算小型无人机螺旋桨气动系数的新经验模型","authors":"Siddhardha Kedarisetty, Joel George Manathara","doi":"10.1007/s42401-023-00203-y","DOIUrl":null,"url":null,"abstract":"<div><p>Designers of small UAVs are often faced with a hurdle in the propeller selection stage in preliminary design due to the lack of simple yet accurate models to estimate small propellers’ performance (thrust coefficient, power coefficient, and efficiency variation with advance ratio). It might even seem impossible to have accurate propeller performance models as the performance depends on the propeller geometry, and small propellers have complex geometries that are not readily available. Nonetheless, by analyzing the performance data of over 170 propellers (diameters ranging from 2 to 18 inches) from different manufacturers, we show that: (a) the thrust and power coefficient curves can be approximated as second and third-order polynomials in advance ratio, respectively, and (b) the coefficients of these polynomials depend predominantly on the pitch ratio. Leveraging this observation, we develop novel empirical relations that determine the coefficients of the polynomial performance curves as functions of the propeller pitch ratio alone. The efficacy of the proposed performance estimation models is demonstrated by accurately predicting the performance curves of several propellers that were not used to construct the empirical relations. Further, using the developed empirical relations, we propose a method to select a suitable propeller that provides high efficiency for a given set of preliminary UAV design parameters like the required thrust and operating velocity.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42401-023-00203-y.pdf","citationCount":"1","resultStr":"{\"title\":\"Novel empirical models for estimating aerodynamic coefficients of small UAV propellers\",\"authors\":\"Siddhardha Kedarisetty, Joel George Manathara\",\"doi\":\"10.1007/s42401-023-00203-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Designers of small UAVs are often faced with a hurdle in the propeller selection stage in preliminary design due to the lack of simple yet accurate models to estimate small propellers’ performance (thrust coefficient, power coefficient, and efficiency variation with advance ratio). It might even seem impossible to have accurate propeller performance models as the performance depends on the propeller geometry, and small propellers have complex geometries that are not readily available. Nonetheless, by analyzing the performance data of over 170 propellers (diameters ranging from 2 to 18 inches) from different manufacturers, we show that: (a) the thrust and power coefficient curves can be approximated as second and third-order polynomials in advance ratio, respectively, and (b) the coefficients of these polynomials depend predominantly on the pitch ratio. Leveraging this observation, we develop novel empirical relations that determine the coefficients of the polynomial performance curves as functions of the propeller pitch ratio alone. The efficacy of the proposed performance estimation models is demonstrated by accurately predicting the performance curves of several propellers that were not used to construct the empirical relations. Further, using the developed empirical relations, we propose a method to select a suitable propeller that provides high efficiency for a given set of preliminary UAV design parameters like the required thrust and operating velocity.</p></div>\",\"PeriodicalId\":36309,\"journal\":{\"name\":\"Aerospace Systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-02-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s42401-023-00203-y.pdf\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Aerospace Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s42401-023-00203-y\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Earth and Planetary Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aerospace Systems","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1007/s42401-023-00203-y","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
Novel empirical models for estimating aerodynamic coefficients of small UAV propellers
Designers of small UAVs are often faced with a hurdle in the propeller selection stage in preliminary design due to the lack of simple yet accurate models to estimate small propellers’ performance (thrust coefficient, power coefficient, and efficiency variation with advance ratio). It might even seem impossible to have accurate propeller performance models as the performance depends on the propeller geometry, and small propellers have complex geometries that are not readily available. Nonetheless, by analyzing the performance data of over 170 propellers (diameters ranging from 2 to 18 inches) from different manufacturers, we show that: (a) the thrust and power coefficient curves can be approximated as second and third-order polynomials in advance ratio, respectively, and (b) the coefficients of these polynomials depend predominantly on the pitch ratio. Leveraging this observation, we develop novel empirical relations that determine the coefficients of the polynomial performance curves as functions of the propeller pitch ratio alone. The efficacy of the proposed performance estimation models is demonstrated by accurately predicting the performance curves of several propellers that were not used to construct the empirical relations. Further, using the developed empirical relations, we propose a method to select a suitable propeller that provides high efficiency for a given set of preliminary UAV design parameters like the required thrust and operating velocity.
期刊介绍:
Aerospace Systems provides an international, peer-reviewed forum which focuses on system-level research and development regarding aeronautics and astronautics. The journal emphasizes the unique role and increasing importance of informatics on aerospace. It fills a gap in current publishing coverage from outer space vehicles to atmospheric vehicles by highlighting interdisciplinary science, technology and engineering.
Potential topics include, but are not limited to:
Trans-space vehicle systems design and integration
Air vehicle systems
Space vehicle systems
Near-space vehicle systems
Aerospace robotics and unmanned system
Communication, navigation and surveillance
Aerodynamics and aircraft design
Dynamics and control
Aerospace propulsion
Avionics system
Opto-electronic system
Air traffic management
Earth observation
Deep space exploration
Bionic micro-aircraft/spacecraft
Intelligent sensing and Information fusion