elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Evaluation of an Unsteady Panel Method for the Prediction of Rotor-Rotor and Rotor-Body Interactions in Preliminary Design

Kunze, Philipp (2015) Evaluation of an Unsteady Panel Method for the Prediction of Rotor-Rotor and Rotor-Body Interactions in Preliminary Design. 41st European Rotorcraft Forum, 1.-4. Sep. 2015, München, Deutschland.

[img] PDF - Registered users only
5MB

Official URL: http://erf2015.dglr.de/

Abstract

The DLR unsteady panel and free-wake code UPM is evaluated for the prediction of rotor-rotor and rotor-body interactions in preliminary design. Therefore, several well-known test cases are selected and used to compare the numerical results with experimental data. The test cases regard a tandem rotor in hover with varying rotor overlap, the performance of a tandem and a coaxial rotor in level flight and on the rotor-body interference and its effect on the rotor inflow and wake. For the proper simulation of the experiments, routines for trimming of dual rotor configurations and for the estimation of profile power were implemented. In course of the investigations, best practices for the application of UPM for interference calculations in predesign were derived, aimed at ensuring accurate results while minimizing the computational costs. Regarding the selected test cases, most of the simulation results show an excellent agreement with experimental data, both qualitatively and quantitatively. The results encourage the integration of UPM into the DLR predesign framework, enabling a physics-based consideration of many steady and unsteady interference effects in this early design stage. Nevertheless, the computational expense of the free-wake method is considerably higher compared to conventional predesign methods and exceeds a practical level for direct integration into design optimization loops. Thus, alternative approaches for the integration of UPM into the preliminary design toolchain are proposed.

Item URL in elib:https://elib.dlr.de/100231/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluation of an Unsteady Panel Method for the Prediction of Rotor-Rotor and Rotor-Body Interactions in Preliminary Design
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kunze, Philippphilipp.kunze (at) dlr.deUNSPECIFIED
Date:September 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Rotorcraft Aerodynamics, Rotor-Rotor Interactions, Rotor-Body Interactions, Preliminary Design, Unsteady Panel Method
Event Title:41st European Rotorcraft Forum
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:1.-4. Sep. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Kunze, Philipp
Deposited On:09 Dec 2015 13:21
Last Modified:09 Dec 2015 13:21

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.