SBIR-STTR Award

Air flow monitor and stall warning device
Award last edited on: 12/19/14

Sponsored Program
SBIR
Awarding Agency
NASA : ARC
Total Award Amount
$547,924
Award Phase
2
Solicitation Topic Code
-----

Principal Investigator
Alfred Worden

Company Information

M W Aerospace Inc

50 Cocoanut Row Suite 212
Palm Beach, FL 33480
   (305) 627-2413
   N/A
   N/A
Location: Single
Congr. District: 21
County: Palm Beach

Phase I

Contract Number: ----------
Start Date: 00/00/00    Completed: 00/00/00
Phase I year
1986
Phase I Amount
$49,596
This proposal is a request for an evaluation of an airflow monitor and stall warning device on a high performance aircraft exhibiting the characteristics of a modern jet transport. The device provides a method of sensing local airflow phenomena over an aircraft wing, including the transition from laminar to turbulent flow, and using this phenomena to predict the approach to a stall. The device employes a hot-film anemometer to sense total local airflow velocity. The total airflow velocity is then reduced to two components; the time average velocity field (u) and the root mean square velocity fluctuations (urms). The ratio of these components (urms/u) has a simple correspondence to tubulence intensity which, in turn, is related to the stall of an airfoil. The significance of this system is that it provides a direct measure of the local air velocity over an airfoil, and can thus sense turbulence preceeding a stall regardless of the status of the wing, i.e.-ice or frost, leading edge slats up or down, or any condition that changes the normal airfoil shape. It is a direct measure of stall conditions compared to secondary devices such as angle-of-attack or stagnation point senors. The purpose of this technical project is to evaluate the hot film anemometer to allow determination of the parameters needed for a sensor providing the same quantities, but more reliable in operational use. The secondary purpose of the project is to gather pilot comments on the display to provide data for analysis to determine the optimum method of displaying the information to the pilot.

Phase II

Contract Number: ----------
Start Date: 00/00/00    Completed: 00/00/00
Phase II year
1987
Phase II Amount
$498,328
___(NOTE: Note: no official Abstract exists of this Phase II projects. Abstract is modified by idi from relevant Phase I data. The specific Phase II work statement and objectives may differ)___ This proposal is a request for an evaluation of an airflow monitor and stall warning device on a high performance aircraft exhibiting the characteristics of a modern jet transport. The device provides a method of sensing local airflow phenomena over an aircraft wing, including the transition from laminar to turbulent flow, and using this phenomena to predict the approach to a stall. The device employes a hot-film anemometer to sense total local airflow velocity. The total airflow velocity is then reduced to two components; the time average velocity field (u) and the root mean square velocity fluctuations (urms). The ratio of these components (urms/u) has a simple correspondence to tubulence intensity which, in turn, is related to the stall of an airfoil. The significance of this system is that it provides a direct measure of the local air velocity over an airfoil, and can thus sense turbulence preceeding a stall regardless of the status of the wing, i.e.-ice or frost, leading edge slats up or down, or any condition that changes the normal airfoil shape. It is a direct measure of stall conditions compared to secondary devices such as angle-of-attack or stagnation point senors. The purpose of this technical project is to evaluate the hot film anemometer to allow determination of the parameters needed for a sensor providing the same quantities, but more reliable in operational use. The secondary purpose of the project is to gather pilot comments on the display to provide data for analysis to determine the optimum method of displaying the information to the pilot.