CN114140021A - Method for evaluating takeoff operation seaworthiness of ultrahigh-altitude civil airport - Google Patents

Method for evaluating takeoff operation seaworthiness of ultrahigh-altitude civil airport Download PDF

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CN114140021A
CN114140021A CN202111506601.6A CN202111506601A CN114140021A CN 114140021 A CN114140021 A CN 114140021A CN 202111506601 A CN202111506601 A CN 202111506601A CN 114140021 A CN114140021 A CN 114140021A
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airport
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李郁
王旭辉
杨乐
张锐
许玉斌
霍琳凌
张永丽
柳萌
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China Academy of Civil Aviation Science and Technology
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Abstract

The invention discloses an evaluation method for the takeoff operation navigability of an ultra-high altitude civil airport, which comprises the steps of A, collecting the surface air pressure QFE, and calculating to obtain the standard field pressure QFE according to the approved height a of an aircraft and the airport elevation zREF(ii) a B. Judging the difference value delta being QFE-QFEREFIf the difference value delta is larger than zero, the navigation is feasible, otherwise, the navigation is not feasible. The invention introduces standard field voltage QFEREFThe parameter is used as a reference, and the scene air pressure QFE acquired in real time is compared with the parameter, so that the airworthiness of the aircraft in the takeoff operation of the civil airport with the ultrahigh altitude is judged, the situation that the airport scene with the altitude slightly higher than 4420 meters and better clearance condition is missed due to a 'one-off' site selection mode is avoided, and the situation that the air pressure is lower and the aircraft is not suitable for navigation due to the fact that the air pressure is slightly lower in the established airport with the altitude slightly smaller than 14500 feet in special weather can be avoidedAnd the condition is effectively judged, so that the safety of the operation of the aircraft is improved.

Description

Method for evaluating takeoff operation seaworthiness of ultrahigh-altitude civil airport
Technical Field
The invention relates to an assessment method for the takeoff operation airworthiness of an airport, in particular to an assessment method for the takeoff operation airworthiness of a civil airport with ultrahigh altitude.
Background
The construction quantity and scale of airports in western regions of China are smaller than those in eastern regions because of the adverse factors of large topographic relief, low air density, low oxygen concentration, low environmental temperature, poor clearance condition, rapid meteorological change and the like. The common feature of the aircraft operating in airports in ultra-high altitude areas is that the aircraft has an approved altitude of 14500 feet (4420 meters), and the past experience shows that the aircraft cannot operate when the airport is higher than 4420 meters. Therefore, airport siting is limited to areas with an altitude of 4420 meters or less, and for areas with an altitude above 4420 meters, "one-off cutting" is adopted, so that airport sitions with a slightly higher altitude than 4420 meters but with better headroom conditions are easily missed. Since the 14500ft of the aircraft certification altitude refers to the barometric altitude, not the altitude, even if the airport altitude is slightly less than 14500ft, there is a possibility that the barometric altitude will exceed the operational envelope under certain conditions, and therefore there is a case of being out of flight even if the altitude is slightly less than 14500ft, and of course there is a case of not being suitable for building an airport.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an evaluation method for the takeoff operation airworthiness of an ultrahigh-altitude civil airport, and standard field voltage QFE is obtained through calculationREFThe standard field voltage QFE obtained by the calculation is usedREFCompared with the currently collected airport surface air pressure, thereby being capable ofThe airworthiness of the aircraft is judged, whether the established airport can run safely can be determined according to the judgment result, and whether the proposed airport field is suitable for being proposed can be determined more scientifically.
The purpose of the invention is realized by the following technical scheme:
a method for evaluating the takeoff operation seaworthiness of an ultra-high altitude civil airport comprises the following steps:
A. collecting the air pressure QFE of the scene, and calculating to obtain the standard field pressure QFE according to the examined height a of the aircraft and the altitude z of the airportREF；
B. Judging the difference value delta being QFE-QFEREFIf the difference value delta is larger than zero, the navigation is feasible, otherwise, the navigation is not feasible;
QFE is pressed to standard field in step AREFThe sea level air pressure QNH is calculated by the corrected sea level air pressure QNH and the reference coefficient K, and the calculation formula is as follows:
QFEREF＝QNH/k5.256；
the corrected sea level air pressure QNH is calculated according to the following formula:
a＝z+145442.15×(1-(QNH/P0)0.1902631)，P0is sea level air pressure under standard atmospheric conditions;
the reference coefficient K is calculated according to the airport elevation z, and the calculation formula is as follows:
K＝288.15/(288.15-0.0065z)。
further, step A acquires the scene air pressure QFE of the proposed ultrahigh altitude airport.
Or step A acquires the scene air pressure QFE of the established ultra-high altitude airport.
The trial height a of the aircraft is 14500ft set by the model of Boeing B737 series and air passenger A319 series.
In order to facilitate the evaluation of whether to build an airport, the scene air pressure QFE which is at least once per month in at least one year and has equal times per month is collected, and the collected scene air pressures QFE are respectively substituted into the difference value delta-QFEREFComparing to obtain a plurality of corresponding difference values delta, when the difference value delta exceeding 85 percent is larger than zero, implementing the establishment of an airport, otherwiseThe proposed airport is cancelled.
To facilitate the assessment of whether to plan for an airport, the scene air pressure QFE is collected at least once every hour of the month.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention introduces standard field voltage QFEREFThe parameter is used as a reference, and the scene air pressure QFE acquired in real time is compared with the parameter, so that the airworthiness of the aircraft in the take-off operation of the civil airport with the ultrahigh altitude is judged, the situation that the airport scene with the altitude slightly higher than 4420 meters and better clearance condition is missed due to a 'one-off' site selection mode is avoided, the condition that the air pressure is low and the aircraft is not suitable for navigation due to the fact that the built airport with the altitude slightly smaller than 14500 feet has the low air pressure in special weather can be effectively judged, and the operation safety of the aircraft is improved.
(2) The method comprises the steps of collecting the scene air pressure QFE of the proposed ultra-high altitude airport in the step A, and comparing the scene air pressure QFE with the standard scene pressure QFEREFThe method can conveniently, quickly, scientifically and effectively determine whether the site is suitable for construction.
(3) The method comprises the steps of A, collecting the scene air pressure QFE of the established ultra-high altitude airport, and comparing the scene air pressure QFE with the standard scene pressure QFEREFThe airworthiness of the aircraft can be judged immediately, and therefore the safety of the operation of the aircraft is improved.
(4) The aircraft adopted by the invention has the trial height a of 14500ft set by the models of Boeing B737 series and air passenger A319 series, and the trial height a is suitable for most of ultra-high altitude civil aircrafts.
(5) The method collects the scene air pressure QFE which is at least once per month in at least one year and has equal times per month, considers the influence of factors such as temperature change in different seasons and the like on the scene air pressure, and respectively brings the collected scene air pressures QFE into difference values delta-QFEREFComparing the difference values to obtain a plurality of corresponding difference values delta, and after the difference values delta are referred to, if the difference value delta exceeding 85% is larger than zero, the proposed airport is implemented, otherwise, the proposed airport is cancelled. And the judgment result is more scientific and rigorous.
(6) The method and the device collect the scene air pressure QFE at least once in each hour of the month, and take the influences of factors such as temperature change in different time periods and the like on the scene air pressure into consideration, so that the accuracy of the judgment result can be improved.
Drawings
FIG. 1 is a flow chart of the method for determining the airworthiness of the takeoff operation of the ultra-high altitude civil airport in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example one
As shown in fig. 1, a method for evaluating the airworthiness of takeoff operation of an ultra-high altitude civil airport comprises the following steps:
A. collecting the air pressure QFE of the scene, and calculating to obtain the standard field pressure QFE according to the examined height a of the aircraft and the altitude z of the airportREF；
B. Judging the difference value delta being QFE-QFEREFIf the difference value delta is larger than zero, the navigation is feasible, otherwise, the navigation is not feasible.
QFE is pressed to standard field in step AREFThe sea level air pressure QNH is calculated by the corrected sea level air pressure QNH and the reference coefficient K, and the calculation formula is as follows:
QFEREF＝QNH/k5.256；
wherein, the corrected sea level air pressure QNH is calculated according to the following formula:
a＝z+145442.15×(1-(QNH/P0)0.1902631)；
in the above formula P0In this example, P is the sea level air pressure under standard atmospheric conditions0The value of (1) is 1013.25hPa, and the currently set trial height of 14500ft of the Boeing B737 series and the Airbus A319 series models is adopted as the trial height a of the aircraft.
The reference coefficient K is calculated according to the airport elevation z, and the calculation formula is as follows:
K＝288.15/(288.15-0.0065z)。
the standard field voltage QFE can be calculated according to the calculation formulaREF. In this embodiment, an altitude of 4500m, i.e. an airport elevation z, is measuredFor the calculation of 4500m airport, a 14500ft, P01013.25hPa and z 4500m into the formula a z +145442.15 x (1- (QNH/P)0)0.1902631) The corrected sea level air pressure QNH is 1016.2 hPa; the reference coefficient K is calculated as 1.112978 by substituting z 4500m into K288.15/(288.15-0.0065 z). Then the corrected sea level air pressure QNH and the reference coefficient K obtained by calculation are substituted into a formula QFEREF＝QNH/k5.256The standard field voltage QFE can be calculatedREFHas a value of 579.0 hpa.
The invention introduces the parameter of standard field pressure QFERF as a reference, compares the field air pressure QFE acquired in real time with the standard field pressure QFERF, thereby judging the airworthiness of the flying-off operation of the aircraft at an ultrahigh-altitude civil airport, avoiding missing an airport site with the altitude slightly higher than 4420 meters and better clearance condition in a 'one-off' site selection mode, and effectively judging the condition that the air pressure is too low and the aircraft is not suitable for flying due to the fact that the established airport with the altitude slightly less than 14500 feet has low air pressure in special weather, thereby improving the safety of the operation of the aircraft.
Since the established airport is monitoring the weather information at any time, wherein the airport also includes the scene air pressure QFE, for convenience of description, the scene air pressure QFE collected in the same time node every month in 1-12 months and every hour from 1-24 hours every month is intercepted in the embodiment, and the collected scene air pressure value is shown as table one.
Hour/month 1 2 3 4 5 6 7 8 9 10 11 12
1 601 602 603 604 605 606 606 607 608 607 606 603
2 601 602 602 604 605 606 606 607 608 607 606 603
3 600 602 602 604 605 605 606 606 607 607 605 603
4 600 602 602 604 604 605 605 606 607 606 605 603
5 600 601 602 603 604 605 605 606 607 606 605 603
6 600 601 601 603 604 604 605 606 607 606 605 602
7 599 601 601 603 604 604 605 606 607 606 605 602
8 599 601 601 603 604 604 605 606 607 606 605 602
9 600 601 602 603 604 605 605 606 607 606 605 603
10 600 602 602 604 605 605 605 606 607 607 605 603
11 601 602 603 604 605 605 605 606 608 607 606 604
12 601 603 603 605 605 605 606 607 608 607 606 604
13 601 603 603 605 605 605 606 607 608 607 606 604
14 601 602 603 604 605 605 605 606 608 607 606 603
15 600 602 602 604 604 605 605 606 607 606 605 603
16 599 601 602 603 604 605 605 606 607 606 604 602
17 599 600 601 603 604 604 605 605 606 605 604 601
18 599 600 601 603 604 604 604 605 606 605 603 601
19 599 600 601 602 603 604 604 605 606 605 604 601
20 599 600 601 603 603 604 604 605 606 605 604 602
21 599 601 601 603 604 604 604 605 606 606 604 602
22 600 601 601 603 604 604 605 605 607 606 605 602
23 600 601 602 604 604 605 605 606 607 606 605 603
24 600 602 602 604 605 605 606 606 608 607 605 603
Watch 1
The first row in the table is listed with months of 1-12 months, the first column is listed with the clock integral point of 1-24 months, the corresponding collected value is the scene air pressure QFE at the time point corresponding to each month of 1-12 months, the first scene air pressure QFE collected in the time period of 0-1 months with the first row in the table sequentially collected values is 601hpa, the first scene air pressure QFE collected in the time period of 0-1 months with 2 months is 602hpa, and the first scene air pressure QFE collected in the time period of 0-1 months with 3 months is 603 hpa. The primary scene air pressure QFE acquired in the time of 1-2 months of the second row with the acquired numerical values in sequence is 601hpa, the primary scene air pressure QFE acquired in the time of 1-2 months of 2 months is 602hpa, and the primary scene air pressure QFE acquired in the time of 1-2 months of 3 months is 602 hpa. The first scene air pressure QFE collected in the time of 2-3 months of the third row with the value of 1 is 600hpa, the first scene air pressure QFE collected in the time of 2-3 months of 2 is 602hpa, and the first scene air pressure QFE collected in the time of 2-3 months of 3 is 602 hpa.
Then, the scene air pressure value collected by the first meter and the standard field pressure QFE obtained by calculation are usedREF579.0hpa are respectively substituted into the formula difference Δ ═ QFE-QFEREFThen the corresponding difference value delta can be obtained, as shown in table two.
Hour/month 1 2 3 4 5 6 7 8 9 10 11 12
1 22 23 24 25 26 27 27 28 29 28 27 24
2 22 23 23 25 26 27 27 28 29 28 27 24
3 21 23 23 25 26 26 27 27 28 28 26 24
4 21 23 23 25 25 26 26 27 28 27 26 24
5 21 22 23 24 25 26 26 27 28 27 26 24
6 21 22 22 24 25 25 26 27 28 27 26 23
7 20 22 22 24 25 25 26 27 28 27 26 23
8 20 22 22 24 25 25 26 27 28 27 26 23
9 21 22 23 24 25 26 26 27 28 27 26 24
10 21 23 23 25 26 26 26 27 28 28 26 24
11 22 23 24 25 26 26 26 27 29 28 27 25
12 22 24 24 26 26 26 27 28 29 28 27 25
13 22 24 24 26 26 26 27 28 29 28 27 25
14 22 23 24 25 26 26 26 27 29 28 27 24
15 21 23 23 25 25 26 26 27 28 27 26 24
16 20 22 23 24 25 26 26 27 28 27 25 23
17 20 21 22 24 25 25 26 26 27 26 25 22
18 20 21 22 24 25 25 25 26 27 26 24 22
19 20 21 22 23 24 25 25 26 27 26 25 22
20 20 21 22 24 24 25 25 26 27 26 25 23
21 20 22 22 24 25 25 25 26 27 27 25 23
22 21 22 22 24 25 25 26 26 28 27 26 23
23 21 22 23 25 25 26 26 27 28 27 26 24
24 21 23 23 25 26 26 27 27 29 28 26 24
Watch two
The difference values delta are all judged to be larger than 0 visually according to the numerical values obtained by the second table, as shown in fig. 1, if the difference value delta is larger than 0, the aircraft can be airworthy, namely, the aircraft can safely take off and run, namely, the established ultrahigh altitude airport is airworthy at the time point corresponding to the above collected scene air pressure QFE. If the real-time monitored scene air pressure QFE value is smaller than the standard scene pressure QFEREF579.0hpa, that is, the difference Δ is not greater than 0, the aircraft is not airworthy, that is, there is a risk in takeoff operation, and it can be determined that takeoff is not performed.
Example two
The present embodiment is substantially the same as the embodiment, except that the step a collects the scene air pressure QFE of the proposed ultra-high altitude airport site. In practice, the surface air pressure QFE is collected at least once every month in at least one year and the number of times of each month is equal, the surface air pressure QFE is collected at least once in each hour of the month, the method for collecting the surface air pressure QFE is the same as the table I in the first embodiment, namely, the surface air pressure QFE is collected at least once in 0-1 hour of 1 month, the surface air pressure QFE is collected at least once in 1-2 hours of 1 month, and the surface air pressure QFE is collected at least once in 2-3 hours of 1 month, namely, the surface air pressure QFE is collected at least once in each whole hour of 1-24 hours of 1 month. And so on, at least once every full hour corresponding to 1-24 hours of 2-12 months.
In this embodiment, a proposed airport with an altitude of 4500m, i.e. an airport altitude z of 4500m, i.e. a standard field pressure QFE of the proposed airport, is exemplified for calculationREFAlso 579.0 hpa. In the present embodiment, the scene air pressure QFE of three years is collected, and for convenience of description, only the highest and lowest scene air pressure values in each month are intercepted, as shown in table three.
Figure BDA0003403352520000071
Figure BDA0003403352520000081
Watch III
The first row in table three lists the year, the first column lists the month of 1-12 months, namely the highest scene air pressure of 1 month of the first year is 601.0hpa, and the lowest scene air pressure is 600.0 hpa; the highest scene air pressure in 1 month of the second year is 601.0hpa, and the lowest scene air pressure is 601.0 hpa; the highest scene air pressure in 1 month of the third year is 599.0hpa, and the lowest scene air pressure is 599.0 hpa; the highest scene air pressure in the first year of 2 months is 602.0hpa, and the lowest scene air pressure is 602.0 hpa; the highest scene air pressure in 2 months of the second year is 603.0hpa, and the lowest scene air pressure is 603.0 hpa; the highest surface pressure in month 2 of the third year was 600.0hpa, and the lowest surface pressure was 601.0 hpa.
Then, the surface air pressure value collected by the third table and the standard field pressure QFE obtained by calculation are usedREF579.0hpa are respectively substituted into the formula difference Δ ═ QFE-QFEREFThen the corresponding delta value of the difference can be obtained, as shown in table four.
Figure BDA0003403352520000082
Watch four
The method and the device fully consider the influence of various climate changes on the air pressure, the construction cost, the proportional relation between the use time and the flight stop time and the use requirements of local residents, and are set to implement the proposed airport when the difference delta exceeding 85 percent is larger than zero, otherwise, cancel the proposed airport. The difference values Δ can be visually judged to be all larger than 0 according to the values obtained from the table four, so that the proposed airport site in the embodiment is suitable for building an airport.
The proposed airport belongs to a major project and relates to various aspects such as capital, environment, civil life and the like, whether the site of the proposed airport is suitable for building the airport can be determined more scientifically through the method, the site of the proposed airport can be determined according to the proportion of more than zero in a plurality of difference values delta obtained by adjusting collected data in the aspects of local economic development, civil life demand and the like in a specific real-time process, and the method for evaluating the takeoff operation airworthiness of the ultrahigh-altitude civil airport can more scientifically determine whether the proposed airport is provided, so that the requirements of different areas, different economic development and the like on multi-factor condition consideration can be met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A method for evaluating the takeoff and running seaworthiness of an ultra-high altitude civil airport is characterized by comprising the following steps: the method comprises the following steps:
A. collecting the air pressure QFE of the scene, and calculating to obtain the standard field pressure QFE according to the examined height a of the aircraft and the altitude z of the airportREF；
B. Judging the difference value delta being QFE-QFEREFIf the difference value delta is larger than zero, the navigation is feasible, otherwise, the navigation is not feasible;
QFE is pressed to standard field in step AREFCalculated from the corrected sea level air pressure QNH and the reference coefficient K, whichThe calculation formula is as follows:
QFEREF＝QNH/k5.256；
the corrected sea level air pressure QNH is calculated according to the following formula:
a＝z+145442.15×(1-(QNH/P0)0.1902631)，P0is sea level air pressure under standard atmospheric conditions;
the reference coefficient K is calculated according to the airport elevation z, and the calculation formula is as follows:
K＝288.15/(288.15-0.0065z)。
2. a method for assessing the airworthiness of takeoff operations at an ultra-high altitude civil airport according to claim 1, characterized in that: step A, collecting scene air pressure QFE of a proposed ultrahigh altitude airport.
3. The method for evaluating the airworthiness of takeoff operation of an ultra-high altitude civil airport according to claim 1, wherein: step A, collecting the scene air pressure QFE of the established ultra-high altitude airport.
4. A method for evaluating the airworthiness of takeoff operation of an ultra-high altitude civil airport according to claim 2 or 3, characterized in that: the trial height a of the aircraft is 14500ft set by the model of Boeing B737 series and air passenger A319 series.
5. A method for assessing airworthiness of takeoff operations at an ultra-high altitude civil airport according to claim 2, wherein: collecting the scene air pressure QFE which is at least once per month in at least one year and has equal times per month, and respectively bringing the collected scene air pressures QFE into difference values delta-QFEREFComparing to obtain a plurality of corresponding difference values delta, and when the difference value delta exceeding 85 percent is larger than zero, planning to build the airport, otherwise, canceling the planning to build the airport.
6. A method for assessing airworthiness of takeoff operations at an ultra-high altitude civil airport according to claim 5, wherein: the scene air pressure QFE is collected at least once during each hour of the month.
CN202111506601.6A 2021-12-10 2021-12-10 Method for evaluating takeoff operation seaworthiness of ultrahigh-altitude civil airport Pending CN114140021A (en)

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CN112133134A (en) * 2020-08-03 2020-12-25 中国民用航空中南地区空中交通管理局 Method, electronic device, medium, and system for preventing setting of wrong QNH value of aircraft
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