VFS Website
  • VIEW CART
  • CUSTOMER SUPPORT
  • MY STORE ACCOUNT
  • CONTACT US
  • STORE HOME
  • 5Prime
  • Forum Proceedings
  • Workshops
  • Technical Meetings
  • Vertiflite
  • Books, CDs & Gifts


Unable to log in or get member pricing? Having trouble changing your password?

Please review our Frequently Asked Questions for complete information on these and other common situations.
 

Vertical Flight Library & Store

CHECKOUT

0 Item(s) In Cart Total: $0.00


A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight

Chen Si-Yu, Zhao Qi-Jun, Zhu Zheng, Ma Yi-Yang

May 8, 2017

  • Your Path :
  • Home
  • > A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight

A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight

  • Presented at Forum 73
  • 9 pages
  • SKU # : 73-2017-0231
  • Your Price : $30.00
  • Join or log in to receive the member price of $15.00!


VFS member?
Don't add this to your cart just yet!
Be sure to log in first to receive the member price of $15.00!

 
Add To Cart

Add to Wish List

Reward Value:
(60) Member Points

A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight

Authors / Details: Chen Si-Yu, Zhao Qi-Jun, Zhu Zheng, Ma Yi-Yang

Abstract
In this paper, a new permeable self-adaptive integration surface is developed for the prediction of rotor HSI noise by KFWH method in forward flight. Firstly, the nonlinear near flowfield solution is computed by a N-S solver and as input for acoustic calculations by KFWH formula. Then, the acoustic pressure predictions of the AH-1 model rotor with cylinder-shaped integration surfaces at different locations are shown, which reveals that the results calculated by KFWH method show a large sensitivity to the location of integration surface. In order to avoid the calculation error caused by the uncertainties in determining the cylinder-shaped integration surface, a new permeable self-adaptive integration surface is determined by density adaptively according to some principles. These principles have been validated in hover flight in previous paper. Then, the acoustic pressure of AH-1 model rotor at different tip Mach numbers and different observer locations are simulated. In comparison with cylinder-shaped integration surface, the self-adaptive integration surface, which is determined by density, can reach higher accuracy in the prediction of rotor HSI noise.

Recently Viewed Items

  • A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight

    Member Price :
    $15.00
    Your Price :
    $30.00

Popular Products

  • Master Card
  • Visa
  • American Express
  • Customer Support
  • Contact Us
  • Privacy and Security Policies
  • Refund Policies

Copyright © 2022 The Vertical Flight Society. All rights reserved.