| ZHANG Hao， WANG Tao， LI Yan-xi.Research on Installation Loss of Turboshaft Engine with Covert Installation Layout[J].航空发动机,2024,50(2):170-174 |
| Research on Installation Loss of Turboshaft Engine with Covert Installation Layout |
| DOI： |
| Key Words:installation loss turboshaft engine flight attitude covert installation layout flight test |
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| Abstract:To determine the installation performance loss of turboshaft engines required for the flight performance evaluation of light
and small helicopters, flight tests were conducted on turboshaft engine with covert installation layout under different helicopter flight
attitudes. Based on test flight data, a set of calculation processes of turboshaft engine installation loss under real flight conditions was
established. The effects of flight attitudes such as stable level flight at different altitudes and speeds, IGE/OGE hover, IGE/OGE hover rota?
tion, different altitude climb, different altitude glide, circling, and side backward flight on the installation loss of turboshaft engine were
compared and analyzed. The results show that the installation loss of turboshaft engine with covert installation layout mainly comes from the
inlet temperature rise; the power loss under different flight attitudes is 4.3%-20.7%, and the relative increment of specific fuel consump?
tion is 1.2%-132.7%; the power loss does not change obviously with the flight altitude, but decreases with the increase of flight speed; the
relative increment of specific flue consumption decreases with the increase of flight altitude and speed; the installation loss is minimized in
low-speed flight attitude near the ground, and it is less affected by ground effects; wind speed and direction have a significant impact on
installation losses. |
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