A Correction Method for Cruising Fuel Consumption Characteristics Based on Circling Flight Test Data
A technology of flight test data and characteristics, applied in the aviation field, can solve problems such as the unique weight of the aircraft, the inability to obtain multiple sets of test flight data, and the inability to accurately measure the fuel consumption.
Active Publication Date: 2021-08-03
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology
However, the previous methods have the following deficiencies: 1. The flight action is instantaneous, considering the error of the fuel sensor, it is impossible to accurately measure the fuel consumption during the execution of the action; Efficiently acquire multiple sets of flight test data in the same flight
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Embodiment 1
[0050] A method for correcting cruise fuel consumption characteristics based on circling flight test data, characterized in that: comprising the following steps:
[0051] a. Select the altitude point, speed point and flight state. Under the same altitude, speed and aircraft weight, select n different roll angles (n is a variable, and the stable circling time is 3 to 5 minutes), and establish a stable circling. Hourly fuel consumption under different roll angles, the calculation formula is as follows:
[0052]
[0053] Among them, W px is the hourly fuel consumption, △W px is the fuel consumption of hovering, △T px is the circling time;
[0054] b. Correction of fuel consumption characteristics, including stable hovering mechanics model and engine mechanics model;
[0055] The equations of the stable hovering mechanics model are as follows:
[0056] L cosφ=G (2)
[0057] T=D(3)
[0058]
[0059]
[0060] CD=CD 0 +A·CL 2 (6)
[0061] Among them, L is the lift...
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The invention discloses a correction method for cruising fuel consumption characteristics based on circling flight test data, comprising the following steps: a. selecting altitude points, speed points and flight states, and calculating the hourly fuel consumption when hovering stably at different roll angles; b. Oil characteristic correction; c. Calculate the hourly fuel consumption of the engine through the functional relationship; e. Correct to the target weight, including the calculation of the fuel consumption in hovering and the calculation of the fuel consumption in level flight; correct the hourly consumption in the level flight state to the target weight through performance data Fuel quantity; by calculating the hourly fuel consumption of different rolls and stable hovering, the hourly fuel consumption of the engine and the fuel consumption of the flat flight state, the analysis and calculation of the test flight data can be carried out at different speeds, and the reliable and accurate The fuel consumption data of circling and level flight, at the same time, by selecting multiple groups of stable circling with different roll angles, the angle of stable circling can be changed to obtain multiple effective test flight data.
Description
technical field [0001] The invention belongs to the field of aviation technology, and in particular relates to a correction method for cruising fuel consumption characteristics based on circling flight test data. Background technique [0002] The fuel consumption characteristics of the aircraft cruising section have a very important impact on the aircraft's range and endurance performance, which is directly related to the accessibility of the aircraft's range and endurance performance indicators in the flight test. However, in the flight test stage, due to the constraints of the aircraft's production time , flight test cost constraints, and the number of flight sorties, the flight test data in the cruising segment is not enough to cover all the sample points of fuel consumption characteristics of the aircraft, resulting in a shortage of data in the analysis of fuel consumption characteristics, which affects the follow-up test flight plan and test flight progress. , in the fl...
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IPC IPC(8): G06F30/28G06F30/15
CPCG06F30/15G06F30/28G06F2119/14
Inventor 冯宇鹏程家林黄祥胡沛韩锐
Owner CHENGDU AIRCRAFT INDUSTRY GROUP