Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics
A conventional helicopter flight dynamics model, which can be coupled with ship airwake date, is developed in this study. In the method, the ship airwake data is obtained by the high-accuracy DES model, and a strategy which can transmit CFD data to the flight dynamics model is established based on t...
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| Format: | Article |
| Language: | zho |
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EDP Sciences
2021-10-01
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| Series: | Xibei Gongye Daxue Xuebao |
| Subjects: | |
| Online Access: | https://www.jnwpu.org/articles/jnwpu/full_html/2021/05/jnwpu2021395p1087/jnwpu2021395p1087.html |
| _version_ | 1797668595434520576 |
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| author | DENG Jinghui |
| author_facet | DENG Jinghui |
| author_sort | DENG Jinghui |
| collection | DOAJ |
| description | A conventional helicopter flight dynamics model, which can be coupled with ship airwake date, is developed in this study. In the method, the ship airwake data is obtained by the high-accuracy DES model, and a strategy which can transmit CFD data to the flight dynamics model is established based on the "one-way" coupling idea. Then, the SFS2 ship model and UH-60A helicopter are chosen as a combination to investigate the influences of the spatial and temporal characteristics of ship airwake from the aspects of control margins and unsteady level. The time-averaged simulation results show that for the counterclockwise-rotor helicopter, although pilot could have more collective pitch margin under crosswind condition compared to the headwind condition, he might possess much less pedal margin due to the sidewash in the airflow. The unsteady results indicate that the unsteady loading level of the helicopter would increase significantly under the crosswind condition compared to the headwind condition due to the increase of turbulent density in the airwake. Furthermore, for the conventional helicopter, the disturbances on the forces and moments which along the rotor hub (i.e., thrust and yaw moment) are the critical factors that increasing the pilot workload during the landing procedure. |
| first_indexed | 2024-03-11T20:31:39Z |
| format | Article |
| id | doaj.art-b95906fe61944f21bb3138c3ddb36626 |
| institution | Directory Open Access Journal |
| issn | 1000-2758 2609-7125 |
| language | zho |
| last_indexed | 2024-03-11T20:31:39Z |
| publishDate | 2021-10-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Xibei Gongye Daxue Xuebao |
| spelling | doaj.art-b95906fe61944f21bb3138c3ddb366262023-10-02T08:32:58ZzhoEDP SciencesXibei Gongye Daxue Xuebao1000-27582609-71252021-10-013951087109610.1051/jnwpu/20213951087jnwpu2021395p1087Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristicsDENG Jinghui0China Helicopter Research and Development InstituteA conventional helicopter flight dynamics model, which can be coupled with ship airwake date, is developed in this study. In the method, the ship airwake data is obtained by the high-accuracy DES model, and a strategy which can transmit CFD data to the flight dynamics model is established based on the "one-way" coupling idea. Then, the SFS2 ship model and UH-60A helicopter are chosen as a combination to investigate the influences of the spatial and temporal characteristics of ship airwake from the aspects of control margins and unsteady level. The time-averaged simulation results show that for the counterclockwise-rotor helicopter, although pilot could have more collective pitch margin under crosswind condition compared to the headwind condition, he might possess much less pedal margin due to the sidewash in the airflow. The unsteady results indicate that the unsteady loading level of the helicopter would increase significantly under the crosswind condition compared to the headwind condition due to the increase of turbulent density in the airwake. Furthermore, for the conventional helicopter, the disturbances on the forces and moments which along the rotor hub (i.e., thrust and yaw moment) are the critical factors that increasing the pilot workload during the landing procedure.https://www.jnwpu.org/articles/jnwpu/full_html/2021/05/jnwpu2021395p1087/jnwpu2021395p1087.htmlhelicoptership airwakeflight dynamics modelcontrol marginunsteady level |
| spellingShingle | DENG Jinghui Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics Xibei Gongye Daxue Xuebao helicopter ship airwake flight dynamics model control margin unsteady level |
| title | Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics |
| title_full | Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics |
| title_fullStr | Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics |
| title_full_unstemmed | Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics |
| title_short | Investigation on effects of time-frequency characteristics of ship airwake on helicopter flight characteristics |
| title_sort | investigation on effects of time frequency characteristics of ship airwake on helicopter flight characteristics |
| topic | helicopter ship airwake flight dynamics model control margin unsteady level |
| url | https://www.jnwpu.org/articles/jnwpu/full_html/2021/05/jnwpu2021395p1087/jnwpu2021395p1087.html |
| work_keys_str_mv | AT dengjinghui investigationoneffectsoftimefrequencycharacteristicsofshipairwakeonhelicopterflightcharacteristics |